Here's a sample credit card P&L:
Net Interest Income: $250
Interchange Revenue: $225
Foreign Exchange Fees: $25
Annual Fees 7 Other: $50
Rewards Expense: $130
Losses: -$85
Direct Expenses: -$250
Overhead: All over the place

This is just one sampling. Each type of credit card, whether it be a low rate, balance transfer, cash back or travel card will have it's own P&L footprint.