diff --git a/packages/client/src/components/expenses/form/ExpenseFormParticipantList.tsx b/packages/client/src/components/expenses/form/ExpenseFormParticipantList.tsx
index 40e6c65..ff75628 100644
--- a/packages/client/src/components/expenses/form/ExpenseFormParticipantList.tsx
+++ b/packages/client/src/components/expenses/form/ExpenseFormParticipantList.tsx
@@ -1,154 +1,138 @@
 import {
-    Box,
-    Button,
-    Dialog,
-    DialogTitle,
-    FormControl,
-    InputLabel,
-    List,
-    ListItem,
-    MenuItem,
-    Paper,
-    Select,
-    Stack,
-    Typography,
-  } from "@mui/material";
-  import Grid2 from "@mui/material/Unstable_Grid2/Grid2";
-  import { useDB, useQuery } from "@vlcn.io/react";
-  import { Participant } from "schema";
-  import { useState } from "react";
-  import { useDbId } from "../../../hooks/useDbId";
-  import ExpenseFormParticipantItem from "./ExpenseFormParticipantItem";
-  import { useExpenseFormState } from "../../../hooks/useExpenseFormState";
-  import { shallow } from "zustand/shallow";
+  Box,
+  Button,
+  Dialog,
+  DialogTitle,
+  List,
+  ListItem,
+  Paper,
+  Stack,
+  Typography,
+} from "@mui/material";
+import Grid2 from "@mui/material/Unstable_Grid2/Grid2";
+import { useDB, useQuery } from "@vlcn.io/react";
+import { Participant } from "schema";
+import { useDbId } from "../../../hooks/useDbId";
+import ExpenseFormParticipantItem from "./ExpenseFormParticipantItem";
+import { useExpenseFormState } from "../../../hooks/useExpenseFormState";
+import { shallow } from "zustand/shallow";
 import { GroupAdd } from "@mui/icons-material";
 import React from "react";
-  
-  function ParticipantsList() {
-    const setFormData = useExpenseFormState((state) => state.setData);
-    const getFormData = useExpenseFormState((state) => state.getData);
-    const updateAmounts = useExpenseFormState((state) => state.updateAmounts);
-    const insertParticipant = useExpenseFormState(
-      (state) => state.insertParticipant
-    );
-    const participantsIndexes = useExpenseFormState(
-      (state) => [...state.participants.keys()],
-      shallow
-    );
-    const [addParticipant, setAddParticipant] = useState<string>("");
 
-    const ctx = useDB(useDbId());
-    const participants = useQuery<Participant>(ctx, "SELECT * FROM participants");
-  
-    async function getCoefficientForParticipant(
-      participantId: Participant["id"]
-    ) {
-      return (
-        await ctx.db.execO<{ coefficient: string }>(
-          `SELECT coefficient
+function ParticipantsList() {
+  const setFormData = useExpenseFormState((state) => state.setData);
+  const getFormData = useExpenseFormState((state) => state.getData);
+  const updateAmounts = useExpenseFormState((state) => state.updateAmounts);
+  const insertParticipant = useExpenseFormState(
+    (state) => state.insertParticipant
+  );
+  const participantsIndexes = useExpenseFormState(
+    (state) => [...state.participants.keys()],
+    shallow
+  );
+  const ctx = useDB(useDbId());
+  const participants = useQuery<Participant>(ctx, "SELECT * FROM participants");
+
+  async function getCoefficientForParticipant(
+    participantId: Participant["id"]
+  ) {
+    return (
+      await ctx.db.execO<{ coefficient: string }>(
+        `SELECT coefficient
            FROM participant_category_coefficients
            WHERE participant_id = ? AND category_id = ?`,
-          [participantId, getFormData().categoryId]
-        )
-      )[0].coefficient;
-    }
-  
-    async function handleInsertParticipant(id: number) {
-      insertParticipant({
-        ...participants.data[id],
-        coefficient: await getCoefficientForParticipant(participants.data[id].id),
+        [participantId, getFormData().categoryId]
+      )
+    )[0].coefficient;
+  }
+
+  async function handleInsertParticipant(id: number) {
+    insertParticipant({
+      ...participants.data[id],
+      coefficient: await getCoefficientForParticipant(participants.data[id].id),
+      amount: "",
+    });
+  }
+
+  async function insertAllParticipants() {
+    const allParticipants = await Promise.all(
+      participants.data.map(async (participant) => ({
+        ...participant,
+        coefficient: await getCoefficientForParticipant(participant.id),
         amount: "",
-      });
-    }
-  
-    async function insertAllParticipants() {
-      const allParticipants = await Promise.all(
-        participants.data.map(async (participant) => ({
-          ...participant,
-          coefficient: await getCoefficientForParticipant(participant.id),
-          amount: "",
-        }))
-      );
-      setFormData({
-        participants: allParticipants,
-      });
-      updateAmounts();
-    }
-  
-    /*
+      }))
+    );
+    setFormData({
+      participants: allParticipants,
+    });
+    updateAmounts();
+  }
+
+  /*
     Modal functions (for adding participant 1 by 1)
     */
-    const [open, setOpen] = React.useState(false);
+  const [open, setOpen] = React.useState(false);
 
-    const handleClickOpen = () => {
-        setOpen(true);
-      };
+  const handleClickOpen = () => {
+    setOpen(true);
+  };
 
-    const handleClose = () => {
-        setOpen(false);
-    };
+  const handleClose = () => {
+    setOpen(false);
+  };
 
-    /*
+  /*
     End of modal functions
     */
 
-    return (
+  return (
     <Paper sx={{ p: 2, height: "100%", overflow: "scroll" }}>
-        <Stack sx={{ flexGrow: 1 }} direction="column" spacing={2}>
+      <Stack sx={{ flexGrow: 1 }} direction="column" spacing={2}>
         <Typography variant="h6">Participating to this expense</Typography>
         <Stack direction="row" justifyContent="center" spacing={2}>
-            <Button 
-            variant="outlined"
-            onClick={handleClickOpen}
-            >
+          <Button variant="outlined" onClick={handleClickOpen}>
             <GroupAdd />
-            </Button>
-            <Dialog
-            open={open}
-            onClose={handleClose}
-            >
-                <DialogTitle>Add participant</DialogTitle>
-                <List sx={{ p: 1 }}>
-                    {participants.data.map((participant, index) => (
-                        <ListItem onClick={() => {
-                            handleInsertParticipant(index);
-                            updateAmounts();
-                            setAddParticipant("");
-                            setOpen(false);
-                        }}
-                        >
-                            {participant.name}
-                        </ListItem>
-                    ))}
-                </List>
-            </Dialog>
-            <Button 
-            variant="outlined"
-            onClick={insertAllParticipants}
-            >
+          </Button>
+          <Dialog open={open} onClose={handleClose}>
+            <DialogTitle>Add participant</DialogTitle>
+            <List sx={{ p: 1 }}>
+              {participants.data.map((participant, index) => (
+                <ListItem
+                  key={index}
+                  onClick={() => {
+                    handleInsertParticipant(index);
+                    updateAmounts();
+                    setOpen(false);
+                  }}
+                >
+                  {participant.name}
+                </ListItem>
+              ))}
+            </List>
+          </Dialog>
+          <Button variant="outlined" onClick={insertAllParticipants}>
             Insert all
-            </Button>
-            <Button
+          </Button>
+          <Button
             variant="outlined"
             color="error"
             onClick={() => setFormData({ participants: [] })}
-            >
+          >
             Remove all
-            </Button>
+          </Button>
         </Stack>
         <Box>
-            <Grid2 container spacing={2}>
+          <Grid2 container spacing={2}>
             {participantsIndexes.map((index) => (
-                <Grid2 key={index} xs={12} sm={6} md={4}>
+              <Grid2 key={index} xs={12} sm={6} md={4}>
                 <ExpenseFormParticipantItem index={index} />
-                </Grid2>
+              </Grid2>
             ))}
-            </Grid2>
+          </Grid2>
         </Box>
-        </Stack>
+      </Stack>
     </Paper>
-    );
-  }
-  
-  export default ParticipantsList;
-  
\ No newline at end of file
+  );
+}
+
+export default ParticipantsList;