Final answer:
The total cost of the buyer's order, including three dozen coffee mugs, four dozen plastic glasses, two dozen insulated soft drink holders, and a delivery charge, amounts to $202.50.
Step-by-step explanation:
The question asks us to calculate the total cost of the buyer's order which includes various items in dozens, along with a delivery charge. We need to multiply the quantity in dozens (12) by the price per unit for each item and then sum these amounts before adding the delivery charge.
First, calculate the cost of the coffee mugs: 3 dozens at $3.75 each equals $135.00 (3 * 12 * $3.75).
Next, calculate the cost of the plastic glasses: 4 dozens at $1.00 each equals $48.00 (4 * 12 * $1.00).
Then, calculate the cost of the insulated soft drink holders: 2 dozens at $0.50 each equals $12.00 (2 * 12 * $0.50).
Add these amounts together and include the delivery charge to find the total order cost:
$135.00 (mugs) + $48.00 (glasses) + $12.00 (holders) + $7.50 (delivery) equals $202.50