Florida Kitchens produces high$-$end cooking ranges. The costs to manufacture and market the ranges at the company$$s volume of $3,000$ units per quarter are shown in the following table:

Unit manufacturing costs

Variable costs $ $1,530$

Fixed overhead $738$

Total unit manufacturing costs $ $2,268$

Unit nonmanufacturing costs

Variable $450$

Fixed $858$

Total unit nonmanufacturing costs $1,308$

Total unit costs $ $3,576$

The company has the capacity to produce $3,000$ units per quarter and always operates at full capacity. The ranges sell for $$4,225$ per unit.

b$-1.$ Considering this opportunity to use the freed$-$up space, what is the maximum purchase price per unit that Florida Kitchens should be willing to pay the Burns Electric to assemble regular ranges?