Lens Junction sells lenses for $45 each and is estimating sales of 15,000 units in January and 18,000 in February. Each lens consists of 2 pounds of silicon costing $2.50 per pound, 3oz of solution costing $3 per ounce, and 30 minutes of direct labor at a labor rate of $18 per hour. Desired inventory levels are: Prepare a sales budget, production budget, direct materials budget for silicon and solution, and a direct labor budget