Item Cost Calc

me = peripheral.find("meBridge")

-- first line: item name
-- second line: maxAmount
-- third line: unitCost
local handle = fs.open("values.txt", "r")
if handle then
    name = handle.readLine()
    print("Name is " .. name)
    maxAmount = handle.readLine()
    print("Max amount is " .. maxAmount)
    unitCost = handle.readLine()
    print("Unit cost is " .. unitCost)
else
    print("File not found...")
    quit()
end
handle.close()

melist = me.listItems()

for i=1, #melist do
    print(melist[i].name)
    if melist[i].name == name then
        listIndex = melist[i]
        print(name .. " found at index " .. i)
    else
        print(name .. " not found.")
    end
end

print(listIndex.name .. " " .. listIndex.amount)

--maxAmount = 4000
print("Max amount " .. maxAmount)

--unitCost = 1024
print("Cost at 50% " .. unitCost)

percent = (listIndex.amount / maxAmount) * 100
print("Current percent " .. percent)

shrinkAmount = (percent-50)/25
print("Shrink result " .. shrinkAmount)

sigmoid = shrinkAmount/(1+math.abs(shrinkAmount))
print("Sigmoid " .. sigmoid)

finalCost = math.floor(unitCost * (1 - (sigmoid * 1.5)))
print("Final cost " .. finalCost)

SellPrice = math.floor(finalCost * 0.9)
print("Sell cost " .. SellPrice)