THE FOLLOWING DATA WERE OBTAINED FROM THE ACCOUNTING RECORDS OF CAMERON CORNER STORE: INVENTORY JULY 1, $12,000 PURCHASES: JULY AUGUST SEPTEMBER 60,000 70,000 59,600 SALES JULY AUGUST SEPTEMBER 70,000 82,000 90,000 THE COMPANY'S GROSS MARGIN IS 20%. INSTRUCTIONS: ESTIMATE THE ENDING INVENTORY COSTS FOR JULY, AUGUST AND SEPTEMBER