a) perpetual system income statment.

b) periodic system income statement.

c) multiple step income statement

Periodic and Perpetual Systems-Recording Purchases and Sales, and Year-End Adjustments; Computing Gross Profit under Both Systems Diaz Inc. uses the gross method to record purchases. Its beginning inventory balance on August 1 is $12,000. The following transactions occurred during the month of August for its major inventory item. Aug. 1 Purchase of merchandise inventory for $54,000 on account, terms 2/10,n/30. Aug. 2 Shipping charges of $1,500 cash paid on delivery of merchandise (shipped f.o.b. shipping point). Aug. 3 After inspection of the merchandise, $2,400 of inventory was returned to the vendor for account credit. Aug. 8 Paid balance on account to vendor. Aug. 15 Sold merchandise inventory on account for $30,000 with a cost of $18,000. Aug. 20 Sold merchandise inventory on account for $24,000 with a cost of $14,400. Aug. 31 Physical inventory count indicated that the ending inventory balance at cost was $28,500