**By lowering the price of apples one cent a dozen a dealer sells for sixty cents sixty apples more than before. What was the original price per dozen?**

Are there 3 unknowns here? P = price of apples, C = cost of apples per dozen, and X = number of apples? From my last question posted I assume P = C * X / 12, but I think I'm having trouble forming the right equation to solve here because I'm not sure how many unknowns I should use. Please help!