$80 ATM withdrawal x 50% = $40 spent in
store
$40 x 25% profit margin = $10.00 additional profit
$10.00 additional profit x 200 transactions =
$2000 in additional
profits due to hosting ATM machine.
Add $1.00 per surchargable transaction (after
first 100) = $100
additional profit.
Total increased profits =
$2100 per month, at no cost to
you.