Colen Corporation produces and sells a single product. In January, the company sold 1,600 units. Its total sales were $158,000, its total variable expenses were $80,400, and its total fixed expenses were $57,300. Required: a. Compute the company's Net operating income for January. (Do not round intermediate calculations. Omit the "$" sign in your response.) Net operating income $N b. Compute the company's Net operating income assuming that the company sells 1,500 units. (Do not round intermediate calculations. Omit the "$" sign in your response.) Net operating income