Answer: The required dealers cost of the refrigerator is $417.
Step-by-step explanation: Given that the selling price of a refrigerator is $521.25 and the markup is 25% of the dealers cost.
We are to find the dealers cost of the refrigerator.
Let x denotes the dealers cost of the refrigerator.
Then, according to the given information, we have
Thus, the required dealers cost of the refrigerator is $417.