i tried figuring out the variable cost per unit which is $7 and you wiuld have to pay $8 for the special order so wouldnt jt be negative?

20. Wilbur Company manufactures basketballs. The budgeted income statement for the year based on the manufacture and sale of 500,000 basketballs, before any special orders, is as follows: Wilbur received a special order offering to buy 50,000 basketballs for $8.00 each. There will be no additional selling expenses (fixed or variable) associated with this order if Wilbur accepts. Assume Wilbur has sufficient capacity to manufacture the additional 40,000 basketballs and that it is within the company's relevant range. What is the change in net income from accepting this special order