Final Answer:
D: $360.00 because The new price of the dining room table after a 125% markup is $360.00, found by adding the markup to the original cost.
Step-by-step explanation:
The store purchased the dining room table for $240.00 and then marked it up by 125%. To calculate the markup price, first, find 125% of $240.00:
\( \text{Markup} = 125\% \times \$240.00 \)
\( \text{Markup} = 1.25 \times \$240.00 \)
\( \text{Markup} = \$300.00 \)
To find the final price, add the markup to the original cost:
\( \text{Final Price} = \text{Original Cost} + \text{Markup} \)
\( \text{Final Price} = \$240.00 + \$300.00 \)
\( \text{Final Price} = \$360.00 \)
Therefore, the new price of the dining room table after a 125% markup is $360.00.