Final answer:
The down payment Mrs. Truett made for the dining room set, which cost $1,200 with a required 30% down payment, was $360.
Step-by-step explanation:
Mrs. Truett bought a dining room set that cost $1,200. The store required a 30% down payment to hold the furniture. To calculate the down payment, you multiply the total cost of the furniture by the percentage required for the down payment:
Down Payment = Total Cost × Down Payment Percentage
Down Payment = $1,200 × 0.30
Down Payment = $360
Therefore, the down payment that Mrs. Truett made for the dining room set was $360.