Answer: The maximum amount of sales you will have to make is 25 sales.
Step-by-step explanation: Since you get paid 50 dollars already you want another 50 to get 100 dollars. Since 1 sale id an extra 2 dollars half of 50 is 25. You will have to make 25 sales to get 100 dollars that week. That is why you will have to make 25 sales.