The total cost of the skateboard is $85.6.
The total cost of the skateboard would be $80 plus the sales tax that is 7% of the price. So, you have to multiply $80 for 7% to determine the amount that would be paid as sales tax:
Then, you have to add the price of the skateboard with the tax to have the total cost:
After you multiply 7% to 80 you will be left with 5.60, then you add 5.60 to 80 to get $85.60. So if she has any more than $85.60 then she will be able to buy the skateboard
5.60 is the tax and the total is 85.60 hope this helps