7. Rabbit Ltd makes 3 products - R1, R2 and R3. All three products use the same category of labor which is available for 187,500 hours per period. The standard costs of the products per unit are: R1 R2 R3 $ $ $ Direct Labor 123.75 74.25 148.50 ($16.50 per hour) Maximum 9,000 8,000 11,000 demand (units) Required: Calculate the shortfall in labor hours for the period