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?

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3