Please explain answers. Thanks!

Presented below is information related to Sarasota Corporation for the current year.

Beginning inventory		$ 608,100
Purchases		1,487,500
Total goods available for sale				$2,095,600
Sales revenue				2,495,000

Compute the ending inventory, assuming that (a) gross profit is 45% of sales, (b) gross profit is 60% of cost, (c) gross profit is 33% of sales, and (d) gross profit is 25% of cost. (Round ratios for computational purposes to 1 decimal place, e.g. 78.7% and final answers to 0 decimal places, e.g. 28,987.)

				Ending Inventory
(a)		Gross profit is 45% of sales		$
(b)		Gross profit is 60% of cost		$
(c)		Gross profit is 33% of sales		$
(d)		Gross profit is 25% of cost		$