Beginning inventory, purchases, and sales data for T$-$shirts are as follows:

April $3$ Inventory

$24$ units

@ $$10$

April $11$ Purchase

$26$ units

@ $$12$

April $14$ Sale

$36$ units

April $21$ Purchase

$18$ units

@ $$15$

April $25$ Sale

$20$ units

Assuming the business maintains a periodic inventory system, determine the cost of goods sold and ending inventory using the following methods:

a$.$ FIFO

b$.$ LIFO

c$.$ Weighted average cost

In your computations, round the average cost per unit to two decimal places and round your final answers to the nearest dollar.