O’brien company manufactures and sells one product. the following information pertains to each of the company’s first three years of operations: variable costs per unit: manufacturing: direct materials $26direct labor $17variable manufacturing overhead $5 variable selling and administrative $1fixed costs per year: fixed manufacturing overhead $530,000fixed selling and administrative expenses $170,000during its first year of operations, o’brien produced 93,000 units and sold 70,000 units. during its second year of operations, it produced 77,000 units and sold 95,000 units. in its third year, o’brien produced 80,000 units and sold 75,000 units. the selling price of the company’s product is $79 per unit. required: 1. assume the company uses variable costing and a fifo inventory flow assumption (fifo means first-in first-out. in other words, it assumes that the oldest units in inventory are sold first): a. compute the unit product cost for year 1, year 2, and year 3.b. prepare an income statement for year 1, year 2, and year 3.