Oahu Kiki tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each month as if it uses a periodic inventory system Assume Oahu Kiki's records show the following for the month of January. Sales totalled 370 units. Beginning Inventory Purchase Purchase Date January 1 January 15 Units 185 Unit Cost $10.6 Total Cost $1,961 510 10.3 5,253 January 24 265 13.6 3,604