Yum Market uses the FIFO cost method in a perpetual inventory system and reported the following information for the month of August: Date Transaction Unit cost Units August 1 Beginning inventory $18 60 August 10 Purchase $24 90 August 18 Sale 70 August 27 Sale 50 What is the total cost of sales in August? Question 5 options: a) $2,520 b) $540 c) $720 d) $2,460 e) $3,240