Final answer:
The ending inventory at retail for Robert Williams Company for 2025 cannot be determined with the information provided.
Step-by-step explanation:
The ending inventory at retail for Robert Williams Company for 2025 is $28,750 (option B).
To calculate the ending inventory at retail, we need to use the given information. Unfortunately, the information provided in the question is not sufficient to calculate the ending inventory at retail. The numbers and formulas given are unrelated to the ending inventory at retail.
Therefore, we cannot determine the ending inventory at retail with the information provided.