Grayson goes to the farmers' market every month to buy some of Ms. Robinson's homemade jam. The jam costs $5 per jar. Last weekend, Ms. Robinson gave a 20% discount for buying at least two flavors. So, Grayson bought b jars of blackberry jam and s jars of strawberry jam.
Pick all the expressions that represent how much Grayson spent on jam last weekend.
The amount Grayson spent on blackberry jam is $5 * b.
The amount Grayson spent on strawberry jam is $5 * s.
Since Grayson bought at least two flavors, he received a 20% discount. So, the total amount he spent is (b + s) * $5 * 0.8.