Question 13 Books R Us Inc. uses the average cost formula in a perpetual inventory system. (Use unrounded numbers in your calculations but round to the nearest cent for presentation purposes in your answer.) Nov 1 Beginning inventory 20 units @ $19.00 per unit Nov 5 Purchase 100 units @ $22.00 per unit Nov 8 Sale 70 units Nov 9 Purchase 80 units @ 22.31 per unit Nov 10 Sale 25 units Nov 22 Sale 40 units Books R Us Inc. has an ending inventory on Nov 30 of $1,418.56 B $1,429.35 $1,370.00 $1,450.15 1 Point