I've tried everything please help

Janet Foster bought a computer and printer at Computerland. The printer had a $700 list price with a $100 trade discount and 2/10, n/30 terms. The computer had a $2,780 list price with a 25% trade discount but no cash discount. On the computer, Computerland offered Janet the choice of (1) paying $110 per month for 17 months with the 18th payment paying the remainder of the balance or (2) paying 5% interest for 18 months in equal payments. a. Assume Janet could borrow the money for the printer at 5% to take advantage of the cash discount. How much would Janet save? (Use 360 days a year. Round your answer to the nearest cent.) Janet's savings b. On the computer, what is the difference in the final payment between choices 1 and 2? (Round your answer to the nearest cent.) Difference final payment