Final answer:
The new cost of a $128.00 item after a 25% discount is $96.00.
Step-by-step explanation:
The new cost of a $128.00 item marked down by 25% can be calculated by finding the discount amount and subtracting it from the original price. To find the discount, multiply the original price by the discount rate, which is 25% or 0.25 in decimal form. So, the discount is $128.00 × 0.25 = $32.00. Subtract the discount from the original price to get the new cost: $128.00 - $32.00 = $96.00. Therefore, we conclude that the new cost of the item after a 25% markdown is $96.00.