Final answer:
After calculating the total cost for each service, Dairy Farms offers a better deal at $52 for 20 gallons of milk compared to Spotted Cow's total cost of $58 for the same amount.
Step-by-step explanation:
To determine which milk delivery service offers a better deal for the ice cream shop using 20 gallons of milk per week, we need to calculate the total cost for each service.
Spotted Cow Service:
Cost per gallon = $2.80
Delivery fee = $2
Total cost for 20 gallons = (20 gallons x $2.80/gallon) + $2 delivery fee = $56 + $2 = $58
Dairy Farms Service:
Cost per gallon = $2.10
Delivery fee = $10
Total cost for 20 gallons = (20 gallons x $2.10/gallon) + $10 delivery fee = $42 + $10 = $52
Comparing the two services, Dairy Farms charges a total of $52 while Spotted Cow charges $58 for the same quantity of milk. Thus, Dairy Farms is the better deal for the ice cream shop.