Please show work

The constraint at Johngrass Corporation is time on a particular machine. The company makes three products that use this machine. Data concerning those products appear below: Assume that sufficient time is available on the constrained machine to satisfy demand for all but the least profitable product. Up to how much should the company be willing to pay to acquire more of the constrained resource? $11.60 per minute $14.10 per minute $91.64 per unit $22.24 per unit