Please help and explain

Wilson Sporting Goods manufactures basketballs. The company has a ball that sells for $25. At present, the ball is manufactured in a small plant that relies heavily on direct labor workers. Thus, variable expenses are high, totaling $15 per ball, of which 60% is direct labor cost. Last year, the company sold 30,000 of these balls, with the following results: Refer to the data in requirement 2. If the expected change in variable expenses takes place, how many balls will have to be sold next year to earn the same net operating income, $90,000, as last year? Number of balls (round answer to 0 decimal places): Wilson Sporting Goods manufactures basketballs. The company has a ball that sells for $25. At present, the ball is manufactured in a small plant that relies heavily on direct labor workers. Thus, variable expenses are high, totaling $15 per ball, of which 60% is direct labor cost. Last year, the company sold 30,000 of these balls, with the following results: Refer to the data in requirement 2. If the expected change in variable expenses takes place, how many balls will have to be sold next year to earn the same net operating income, $90,000, as last year? Number of balls (round answer to 0 decimal places)