PLEASE PLEASE PLEASE HELP HERE WITH ALL THE BLANKS!!! Perpetual inventory using LIFO

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

Inventory

Dec. $13,100$ units at $$20$

Purchases

Dec. $101,550$ units at $$22$

$201,395$ units at $$24$

Sales

Dec. $122,170$ units

$141,860$ units

$31930$ units

at two different costs, enter the units with the HIGHER unit cost first in the Cost of Goods Sold Unit Cost column and LOWER unit cost first in the Inventory Unit Cost column.