A company uses raw material to produce two products. For $150, a unit of raw material can be purchased and processed into four units of product 1 and two units of product 2. If x₁ units of product 1 are produced, they can be sold at 250 – x₁ dollars per unit. If x₂ units of product 2 are produced, they can be sold at 140 – x₂ dollars per unit. The company can choose the number of units of raw material that are purchased and processed. How can the company maximize its profit?