Colonial Heritage makes reproduction colonial furniture from select hardwoods.

Chairs

Selling Price per unit is $$80$

Variable cost per unit is $$30$

Board feet per unit is $2$

Monthly demand is $600$

Tables

Selling price per unit is $$400$

Variable cost per unit is $$200$

Board feet per unit is $10$

Monthly demand is $100$

Assume the company follows the pan we proposed, up to how much should Colonial be wiling to pay above the usual price to obtain more hardwood? a$.$ $$40$ per board foot, b$.$ $$25$ per board foot and c$.$ $$20$ per board foot. Please give me the step by step solution