Answer:
Step-by-step explanation:
The 10.5s represents the cost of buying all the shirts only. Each shirt costs $10.50 so buying s of them (s is some positive whole number) costs 10.50s which is the same as 10.5s
Then we tack on the price of the shoes to get
to be the total amount Robbie spends, which is in dollars. This amount must be 65 or smaller which leads to the final answer shown above.