Shown below is activity for one of the products of Denver Office Equipment:

January $1$ balance, $590$ units @ $$50$ per unit $$29,500$

Purchases:

January $10$: $590$ units @ $$50$ per unit

January $20$: $1,020$ units @ $$60$ per unit

Sales:

January $12$: $840$ units

January $28$: $790$ units

Required:

Compute the January $31$ ending inventory and cost of goods sold for January, assuming Denver uses average cost and a perpetual inventory system.