Prepare a monthly operating budget for the first quarter with the following schedules:

a) Direct materials purchases budget

how the desired ending inventory ( desired EI) is calculated?

**please show calculations (everything)

Electra Manufacturing, Inc., produces control valves used in the production of oil field equipment. The control valves are sold to various gas and oil engineering companies throughout the United States. Projected sales in units for the coming four months are as follows: The following data pertain to production policies and manufacturing specifications followed by Electra: a. Finished goods inventory on January 1 is 13,000 units. The desired ending inventory for each month is 70 percent of the next month's sales. b. The data on materials used are as follows: Inventory policy dictates that sufficient materials be on hand at the beginning of the month to produce 50 percent of that month's estimated sales. This is exactly the amount of material on hand on January 1. c. The direct labor used per unit of output is two hours. The average direct labor cost per hour is $15. d. Overhead each month is estimated using a flexible budget formula. (Activity is measured in direct labor hours.) e. Monthly selling and administrative expenses are also estimated using a flexible budgeting formula. (Activity is measured in units sold.) f. The unit selling price of the control valve is $90. g. In February, the company plans to purchase land for future expansion. The land costs $90,000. 290 Fundamental Costing and Control h. All sales and purchases are for cash. Cash balance on January 1 equals $162,900. If the firm develops a cash shortage by the end of the month, sufficient cash is borrowed to cover the shortage. Any cash borrowed is repaid one month later, as is the interest due. The interest rate is 12 percent per annum