Answer:
To find the trade discount rate, you can use the formula:
Trade Discount Rate = (List Price - Net Price) / List Price
In this case, the list price is $13,200 and the net price is $9,900. Plugging these values into the formula:
Trade Discount Rate = ($13,200 - $9,900) / $13,200
Trade Discount Rate = $3,300 / $13,200
Trade Discount Rate = 0.25
To express the trade discount rate as a percentage, you multiply it by 100:
Trade Discount Rate = 0.25 * 100
Trade Discount Rate = 25%
Therefore, the trade discount rate is 25%.