Jill bought items costing $3.45 , $ 1.99, $6.59 , and $ 12.98 . she used a coupon worth $2. 50. if jill had $ 50.00 when she went into the store , how much did she have when she left

What you do is add 
$3.45
$1.99
$6.59
$2.50
$12.98
which the sum of that is $27.51 then you subtract the coupon with the total which is $25.01 and then you take $25.01 and subrtact $50.00 thn your answer is $24.99