Lowwater Sailmakers Manufactures Sails for Sailboats If a Special Sales Order Is Accepted for 2,500 Sails

Lowwater Sailmakers manufactures sails for sailboats. The company has the capacity to produce 25,000 sails per year, and is currently producing and selling 20,000 sails per year. The following information relates to current production:
$$\begin{array} { | l | r | } \hline \text { Sale price per unit } & \$ 150 \\\hline \text { Variable costs per unit: } & \\\hline \text { Manufacturing } & \$ 55 \\\hline \text { Marketing and administrative } & \$ 25 \\\hline \text { Total fixed costs: } & \\\hline \text { Manufacturing } & \$ 640,000 \\\hline \text { Marketing and administrative } & \$ 280,000 \\\hline\end{array}$$ If a special sales order is accepted for 2,500 sails at a price of $70 per unit, fixed costs increase by $10,000, and variable marketing and administrative costs for that order decrease by $5 per unit, how what is the change in operating income?

A) Operating income decreases $22,500.
B) Operating income decreases $82,500.
C) Operating income decreases $10,000.
D) Operating income increases $22,500.