Answer :
Total cost is $1682.70-get this is by
1580 * 6.5 equals 102.70
You need to times your 1580 by your tax percent to figure out how much money your tax is once you've divided it I got $102.70 since you have to add tax to your original cost when you add 1580 +102.70 you get $1682.70
convert 6.5% to a decimal = .065
1580 x .065= $102.70 tax
total cost $1580+$102.70= $1682.70
Total cost= $1682.70
hope this helps