Zephron Music purchased inventory for $ 4 comma 000 and also paid a $ 320 freight bill. Zephron Music returned 30% of the goods to the seller and later took a 3% purchase discount. Assume Zephron Music uses a perpetual inventory system. What is Zephron Music's final cost of the inventory that it kept? (Round your answer to the nearest whole number.) A.$ 3,036 B.$ 2,933 C.$ 2,716 D.$ 1,164