Perpetual inventory using LIFO

Beginning inventory, purchases, and sales data for prepaid cell phones for December are as follows:

Inventory

Dec. $12,500$ units at $$24$

Purchases

Dec. $101,250$ units at $$26$

$201,125$ units at $$28$

Sales

Dec. $121,750$ units

$141,500$ units

$31750$ units

Schedule of Cost of Goods Sold

LIFO Method

Prepaid Cell Phones