I'm out $4.52 on this transaction. I happen to carry a balance on the credit card I charged this to, and it has a 24% interest rate = 2% per month. The statement just closed, so United's charges are on the statement subject to interest. $226 times 2 percent = $4.52 (approximately).
07/17/12 07/17/12 INTEREST CHARGE-PURCHASES 42.16
07/15/12 07/17/12 UNITED 01xxxx41 75.00
07/15/12 07/17/12 UNITED 01xxx530 75.00
07/15/12 07/17/12 UNITED 01xxxx96 38.00
07/15/12 07/17/12 UNITED 01xxx385 38.00