Yes...b5 is the total transactions and b6 is the value of each transaction for the formula.

So the first 100 transactions are charged at 5% of the transaction value (b6) up to a maximum fee of $1.5. Then the next 100 transactions are charged at 5% of the transaction value up to a maximum of $1.00...then any transactions over 200 are charged at 5% of the transaction value up to a maximum of $.5 per transaction (these fees are all per transaction).

So, a monthly total for 150 transactions with an average value of $20 per transaction would be:

Fixed fee of $25 per location (see sheet) + 100*$20*5% ($100 since the fee was less than $1.5 per transaction) + 50*$20*5% ($50 since the fee was right at $1 per transaction) = ($25+$100+$50=$175)

Hopefully that outlines the logic....