Answer:$170
Explanation:
Consumer surplus is the difference in the amount a consumer is willing to pay for a product and the actual cost of the product.
Here, Abe is willing to pay $400, while the grill actually cost $300. Consumer surplus is $100.
Butch is willing to pay $350, while the grill actually cost $300. Consumer surplus is $50.
Collins is willing to pay $320, while the grill actually cost $300. Consumer surplus is $20. And Daniel is willing to pay $200, while the grill actually cost $300. Consumer surplus is $0. Total is $100+$50+$20= $170