Greg's Bicycle Shop has the following transactions related to its top-selling Mongoose mountain bike for the month of March. Greg's Bicycle Shop uses a periodic inventory system. Cost per Unit Date March 1 Beginning inventory March 5 Sale($360 each) March 9 Purchase March 17 Sale ($410 each) March 22 Purchase March 27 Sale ($435 each) March 30 Purchase Transactions Units Total Cost 20 $230 $ 4,600 15 10 250 260 280 2,500 2,600 2,240 $11,940 10 12