Answer and Explanation:
The journal entries are shown below:
1. Processor charges - Credit card expense Dr ($10,500 × 3%) $315
 Cash Dr $10,185
 To Sales Revenue $10,500
(Being the credit card expense is recorded)
For recording this we debited the cash and expenses as it increased the asset and expenses and credited the sales revenue as it also increased the revenue 
Processor charges - debit card expense Dr ($6,000 × 3%) $180
 Cash Dr $5,820
 To Sales Revenue $6,000
(Being the debit card expense is recorded)
For recording this we debited the cash and expenses as it increased the asset and expenses and credited the sales revenue as it also increased the revenue 
2. Cash Dr $10,500
 To Sales Revenue $10,500
(Being the cash receipt is recorded)
For recording this we debited the cash as it increased the asset and credited the sales revenue as it also increased the revenue 
Cash Dr $6,000
 To Sales Revenue $6,000
(Being the cash receipt is recorded)
For recording this we debited the cash as it increased the asset and credited the sales revenue as it also increased the revenue