2. Elizabeth, a student is going to buy a new computer costing $1530. She does not have cash on hand to make this purchase. She expects to have money to pay it off in 180 days. Calculate her interest cost if she makes her purchase financed in the following methods. (a) She pays with a cheque from her personal line of credit which has a rate of 12.99% b) She pays with her credit card which has 25 days free and then starts charging 20.99% interest