Answer:
$55,111.11
Step-by-step explanation:
You want the average cost of 8000 T-shirts sold from an inventory of 10,000 T-shirts purchased for $6 each, and 8,000 T-shirts purchased for $8 each.
The cost of the 10000+8000 = 18000 T-shirts in inventory is ...
10000 × $6 + 8000 × $8 = $60000 +64000 = $124000
The cost of 8000 of those shirts is ...
(8000/18000) × $124000 = $496000/9 = $55,111.11
The cost of goods sold in March is $55,111.11.