130A company will make weekly planning for the production of four new products (A, B, C and D). The amount of resources required per unit product, the weekly capacity of the company and the unit profit to be obtained from the products are given in the table below. Xi: The product quantity (I=1,2,3,4) In the market research, it has been concluded that the demand for product A will be at most 40 per week, and product D will be sold at least 60 units per week. Accordingly, the company's director has determined the following goals depending on the priority degree. 1. The quantity of product A is not more than 40 as far as possible. 2. The amount of product D is not less than 60 as far as possible. 3. The amount of fabric used per week should not exceed the total capacity as much as possible. 4. If the amount of fabric used per week falls below the total capacity, the difference is not more than 20m2 as much as possible. Build the priority Goal Programming Model