Dollar Town Dollar Town is a merchandising company that uses the periodic inventory system. Selected account balances are listed below: Sales $105,000 Purchases 54,000 Beginning Inventory 13,800 Ending Inventory 10,200 Purchase Returns and Allowances 1,800 Purchase Discounts 4,200 Transportation-in 2,400 Sales Discounts 4,800 Sales Returns and Allowances 3,000 Refer to the information provided for Dollar Town. Calculate the company's gross margin. a $51,000 b. $46,800 c. $43,200 d. $40,800