Pioneer Company sells medical supplies to customers. Review the following transactions and prepare the journal entry or entries if Pharmaceutical Supplies uses:

A. the perpetual inventory system

B. the periodic inventory system

July 9 A customer purchases 50 pairs of crutches at a sales price of $20 per pair. The cost to Pioneer Company per pair is $8.00. The terms of the sale are 5/10, n/30, with an invoice date of July 9.

July 12 The customer who made the July 9 purchase returns 9 of the pairs to the store for a full refund, claiming they were the wrong size. The crutch pairs were returned to the stores inventory at $8.00 per pair.

July 18 The customer pays in full for the remaining crutches, less the return.