[The folowing inforrmation applies to the questions displayed below 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 nventory system. Cost per Units Unit Total Cost Date March 1 March 5 March 9 March 17 March 22 March 27 March 30 Transactions Beginning inventory Sale ($390 each) Purchase Sale ($440 eoch) Purchase Sale ($465 each) Purchase 20 $245 4,900 15 10 265 2650 10 275 12 8 295 2,750 2,360 $12,660