First, let's sum the single costs of each item.
[tex]32+32+20=84[/tex]
Because they are buying 1 jacket, 2 pairs of jeans, and 1 vest. So, the subtotal of these items is $84. (At Discount Heaven)
Then, we apply a 7% sales tax.
[tex]84+0.07\cdot84=84+5.88=89.88[/tex]
As you can observe, the sales tax is $5.88 for all the items purchased, and the total cost they have to pay is $89.88.
