To find the sale price of the 5-pound box of nails after a 20% discount, we can follow these steps:
-
Calculate the amount of the discount: \[ \text{Discount} = \text{Original Price} \times \text{Discount Rate} = 16.80 \times 0.20 = 3.36 \]
-
Subtract the discount from the original price to find the sale price: \[ \text{Sale Price} = \text{Original Price} - \text{Discount} = 16.80 - 3.36 = 13.44 \]
Therefore, the sale price of one 5-pound box of nails is $13.44.