Sara's Boutique has the following transactions related to its top-selling Gucci purse for the month of October. Sara's Boutique uses a periodic inventory system. Date Transactions Units Unit Cost Total Cost October 1 Beginning inventory 6 $700 $4,200 October 4 Sale 4 October 10 Purchase 5 710 3,550 October 13 Sale 3 October 20 Purchase 4 720 2,880 October 28 Sale 7 October 30 Purchase 8 730 5,840 $16,470