Hello, I am having issues under standing this instruction in the road to redux project:

A player may travel for any number of days, which costs 20 supplies for each day but adds 10 kilometers each day.

If the `action.type`

is `'travel'`

, assume that the `action.payload`

contains the number of days to travel. Return a new state object with:

- 20 less
`supplies`

for each day - 10 more kilometers of
`distance`

traveled for each day - The number of days added to
`days`

This is what I have for code:

```
const initialWagonState = {
suplies: [100],
distance: [0],
days: [0]
};
const oreganTrail = (state = initialWagonState , action) => {
switch (action.type) {
case 'gather': {
return {
supplies: supplies.food +15,
distance: distance.kil,
days: days.days +1
}
...state,
}
default: {
return state;
}
}
}
```