How do i make a sell script give coins for fat?

i want it to sell Fat in return for Coins but idk how

I see what game your making, an "Eat Junk and Get Fat" simulator, how original.
Anyways, You need to decide how much coins a player would get. An example would be fat / 2 would equal how many coins the player would get. So here would be the code:

--Event goes here
local p = game.Players.LocalPlayer
p.leaderstats.Coins.Value = p.leaderstats.Fat.Value / 2 --Again, replace 2 with any number.
--end)

Make a new script with this code:

game.Players.PlayersAdded:Connect(function(plr)
Instance.new("Folder",plr).Name = "leaderstats"
Instance.new("IntValue",plr.leaderstats).Name = "Coins"
Instance.new("IntValue",plr.leaderstats).Name = "Fat"
end)

Happy Devolping! Vivilian9