The tech took the oil for your bike from a 200 l barrel.The person that wrote up the invoice didn't know how to calculate the value of oil from the barrel and just entered the next item on the inventory list as your purchase which was a 4l jug.
They owe you.Go back for it.If you don't you are just supporting the owners early retirement fund.
They owe you.Go back for it.If you don't you are just supporting the owners early retirement fund.