A pharmacist orders medications for a total of $6,439.65. A 6 1/4% discount is given if paymentis made within 15 days, and a 2.5% discount is given if payment is made within 30 days. How much money can be saved by paying in 15 days instead of 30 days?

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "