Sylvia's Designs Co. had the following inventory activity during April):

Unit Units Cost

Beginning inventory 100 $10

Purchase (April 3) 50 12

Sale (April 10) 80 80

Purchase (April 18) 40 14

Purchase (April 23) 60 15

Sale (April 28) 120

Assuming Sylvia's uses a periodic FIFO cost flow assumption, cost of goods sold for April would be:

a. $2,560

b. $ 750

c. $2,310

d. $ 500