III. Computation

The beginning inventory, purchases and sales of a particular inventory item of Carlo Company during the year were as follows:

$\backslash$table$[[,,,$Units,Unit Price$],[$January$,1,$Inventory,$150,$P $12],[$June$,14,$Purchases,$200,14],[$July$,3,$Sales,$100,18],[$September$,1$ Purchase,$300,15,],[$October$,22,$Sale,$200,16],[$December$,14,$Purchases,$350,19]]$

Determine the following:

Number of units of inventory on hand at the end of the period;

Value of inventory ending and cost of sales using the following methods:

a$.$ Weighted average

b$.$ First$-$In$-$First$-$out

c$.$ Last$-$In$-$Last$-$out