Isaiah Sporting Goods uses the perpetual average cost method of determining inventory costs. Below is the inventory record for Product C124:
Date Received Sold Cost/Unit Balance
April 22 534 $6.58 $3,513.72
May 17 433 $6.70 $2,901.10
June 21 389 $6.76 $2,629.64
August 2 436 $6.44 $2,807.84
What is the average cost per unit after the receipt of the June 21 inventory?
A. $6.62
B. $6.61
C. $6.72
D. $6.67