Snapshot from your Monthly Statement:
Customer is on the $45 per month, $0.20 per order plan. Credit card processing fees of 2.5% + 0.25 (3.5% + 0.25 for Amex).
August 3rd, 1 order of $56.49
2.5% + 0.25 credit card processing fee = 1.41 + 0.25 + 0.20 (per order fee) = $1.86
August 6th, 1 order of $35.76
2.5% + 0.25 credit card processing fee = 0.89 + 0.25 + 0.20 (per order fee) = $1.34