find percentage for gross profit, last expert got is wrong

4. Hair World is considering a contract to sell merchandise to a hair salon chain for $13,000. This merchandise will cost Hair World $9,040, What would be the increase or decrease) to Hair World's gross profit and gross profit percentage? (Round "Gross Profit Percentage" to 1 decimal place.) Answer is complete but not entirely correct. increased by $ 3.960 Gross Profit Gross Profit Percentage decreased to 30.5 % % Required information [The following information applies to the questions displayed below) Hair World Inc. is a wholesaler of hair supplies. Hair World uses a perpetual inventory system. The following transactions (summarized) have been selected for analysis: $35,200 a. Sold merchandise for cash (cost of merchandise $20,797). b. Received merchandise returned by customers as unsatisfactory (but in perfect condition) for cash refund (original cost of merchandise $240 ). c. Sold merchandise (costing $3,800 ) to a customer on account with terms n/60. d. Collected half of the balance owed by the customer in (c). e. Granted a partial allowance relating to credit sales the customer in (c) had not yet paid. 8,000 4,000 128