Hello, l am using LibreOffice Calc but l'm hoping it won't affect matters.
KEY TO EXPRESSIONS:
$AG$3 = PayPal fee percentage
$AG$4 = PayPal fixed fee per transaction (e.g. £0.30 per transaction)
$AG$6 = eBay Fee Cap
$AG$7 = Alternative Payment Gateway fee percentage
$AG$8 = Alternative...