Zero Property of Multiplication — Definition & Examples

Gus just put in an order of Girl Scout cookies. He bought $2$ boxes of Samoas for $\$3.50$ each, $0$ boxes of Thin Mints for $\$4$ each, and $1$ box of Peanut Butter Patties for $\$2.50$ each.

How much of Gus' total order did he spend on Thin Mints?