Roy Manufacturing purchased inventory for $6,000 and also paid a $370 freight bill. Roy Manufacturing returned 30% of the goods to the seller and later took a 1\% purchase discount. Assume Roy Manufacturing uses a perpetual inventory system. What is Roy Manufacturing's final cost of the inventory that it kept? (Round your answer to the nearest whole number.) A. $4,414 B. $4,158 C. $4,528 D. $1,782