i need help with 1,3,4 im all set on 2

1) Sweet Baby Diaper Company sells disposable diapers for $.20 each. Variable costs are $.05 per diaper, while fixed costs are $75,000 per month for volumes up to 950,000 diapers and $112,500 per month for volumes above 950,000 diapers. Prepare a flexible budget for volumes of 800,000 diapers, 900,000 diapers and 1,000,000 diapers. (6 points) 2) wright Company expects cash sales for July of $12,000, and a 20% monthly increase during August and September. Credit sales of $4,000 in July should be followedby 10% decreases during August and September. What are budgeted cash sales and budgeted credit sales for September? (6 points) 3) Western Outfitters Mountain Sports projected 2008 sales of 75,000 units at a unit sale price of $12.00. Actual 2008 sales were 72,000 units at $14.00 per unit. Actual variable costs, budgeted at $4.00 per unit, totaled $4.75 per unit. Budgeted fixed costs totaled $375,000 while actual fixed costs amounted to $400,000. 4) During July, Neptune Company had actual sales of $144,000 with a volume of 64,000 units compared to budgeted sales of $156,000 of 65,000 units. Actual variable cost of goods sold was $108,800, compared to a budget of $109,200. Monthly fixed expenses, budgeted at $22,400, totaled $20,000. Interest revenue of $2,000 was earned during July but had not been included in the budget. Prepare a flexible budget performance report for July and explain Neptune's operating income variance. (10 points)