please solve using excel solver only. thanks

Tractor Land is Sault St. Marie's premier tractor dealer. This is the place to shop for one of the three models of powerful machines - Diggy, Lifty, and Pushy. The cost to the Dealer for every Diggy is $20,000, every Lifty is $15,000, and each Pushy is $21,500. A Diggy sells for $25,000, a Lifty for $22,000, and a Pushy for $30,000. Space is limited at the Dealer, so only up to 50 tractors can be in stock at once. A Pushy takes up the space of two of the other tractors (A Diggy and a Lifty are the same size). The Dealer has a budget of $1,000,000 for stock, and three employees to prepare tractors for sale. It takes 5 hours to prepare a Pushy for sale, 4.5 hours to prepare a Lifty, and 3.5 hours to get a Diggy ready for sale. The three employees have a total of 200 hours available for this prep work. What mix of tractors is optimal for Tractor Land to stock under these constraints, if optimizing profits is the objective. Prepare and solve a Linear Programming model with an integer solution