A company produces two products, A and B. The sales volume for product A is at least 60% of the total sales of the two products. Both products use the same raw material, of which the daily availability is limited to 100kg. Products A and B use this raw material at the rates of 2kg/unit and 4kg/unit, respectively. The sales prices for the two products are $20 and $35 per unit respectively. Formulate a linear programming model for this problem first and then solve this model by using graphical method. Make sure the results are accurate to two decimal places!

Schuepfer inc. bases its selling and administrative expense budget on budgeted unit sales. the sales budget shows 1,800 units are planned to be sold in march. the variable selling and administrative expense is $4.30 per unit. the budgeted fixed selling and administrative expense is $35,620 per month, which includes depreciation of $2,700 per month. the remainder of the fixed selling and administrative expense represents current cash flows. the cash disbursements for selling and administrative expenses on the march selling and administrative expense budget should be: