Final answer:
Mr. Johnson will save $10.08 on the turkey at a 20% discount off the original cost of $50.40 before taxes.
Step-by-step explanation:
To calculate the savings Mr. Johnson will have on the turkey, we need to first find out the original cost of the turkey before the discount is applied. The turkey weighs 18 pounds and costs $2.80 per pound. So the original cost is:
Original Cost = 18 pounds × $2.80/pound = $50.40.
Now let's figure out how much he saves with a 20% discount. A 20% discount off of the original cost is:
Savings = 20% × Original Cost
Savings = 0.20 × $50.40 = $10.08.
Therefore, Mr. Johnson will save $10.08 on the turkey before taxes.