How does one calculate product pricing to cover processing fees from $5 - $5,000 while maintaining a profit?

How does one calculate product pricing to cover processing fees from $5 -
$5,000 while maintaining a profit?

Credit card processor charges, for each transaction, 2.9% + $0.30.
I need to find an amount that covers that cost, from $$5 to $5,000, on a
per item basis, all while maintaining a small profit.
For example, a customer may want to purchase 3 items. Each item has a
different price and possibly a different fee structure based on whether or
not it's a for-profit purchase or non-profit purchase.
Item 1 is $$10 and for-profit so we need to account for the processing fee
plus a 5% profit.
Item 2 is $$80 and for-profit so we need to account for the processing fee
plus a 5% profit.
Item 3 is $$25 and non-profit so we need to account for the processing fee
only- no profit.
What I cannot determine is a full-proof way to account for the fees all
the way up to $5,000 without losing money on the processing fees.