A farmer can buy two types of plant​ food, mix A and mix B. Each cubic yard of mix A contains 20 pounds of phosphoric​ acid, 30 pounds of​ nitrogen, and 5 pounds of potash. Each cubic yard of mix B contains 10 pounds of phosphoric​ acid, 30 pounds of​ nitrogen, and 10 pounds of potash. The minimum monthly requirements are 450 pounds of phosphoric​ acid, 960 pounds of​ nitrogen, and 210 pounds of potash. If mix A costs ​$20 per cubic yard and mix B costs ​$35 per cubic​ yard, how many cubic yards of each mix should the farmer blend to meet the minimum monthly requirements at a minimum​ cost? What is this​ cost? Question content area bottom Part 1 If mix A costs ​$20 per cubic yard and mix B costs ​$35 per cubic​ yard, the farmer should blend enter your response here ydcubed of mix A and enter your response here ydcubed of mix B to meet the minimum monthly requirements at a minimum cost.The cost is ​$ .