To find out total costs after tax simply set up a proportion. Here is my work:
1. 6.25/100 = 707.98/x (part/whole = is/of)
2. Cross multiply to get 707.98(100) = 6.25(x)
3. Solve 70798 = 6.25x by dividing to get x = 11327.68.
After the sales tax, your total is $11327.68. Hope this helped :))
