"The J&J Company has three product lines of belts -- A, B, and C. The difference beween the price and variable cost for A is $15; the difference between the price and variable cost for B is $10; and the difference between the price and variable cost for C is $5. The president foresees sales up to 204,000 units in the coming period, consisting of 30,000 units of A, 91,000 units of B, and 83,000 units of C. The company's fixed costs for the period are $313,000. What is the company's break-even volume, assuming that the given sales mix among A, B, and C remain the same? Hint: calculate the weighted average of the price minus variable cost for all belts combined."