along with the picture this is what #$2$ is asking

Assume that the market price per unit $($cost to replace$)$ of Douglas's inventory on December $31$ was $$13.$ Calculate the total amount to be assigned to the ending inventory on December $31$ under each of the following methods:

a$.$ FIFO lower$-$of$-$cost$-$or$-$market

b$.$ Weighted$-$average lower$-$of$-$cost$-$or$-$market