I really don't understand any of these flexible budgets. If possible please include explanation.

The following cost formulas were used to construct the planning budget: Medical supplies Lab tests Equipment depreciation Rent Utilities Administration Cost Formulas $14.509 $11.009 $3,100 $1,300 $650 $10,300 + $2.500 ook Hint Required: 1. Complete the flexible budget performance report for September. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None' for no effect (i.e., zero variance). Input all amounts as positive values.) rint St. Lucia Blood Bank Flexible Budget Performance Report For the Month Ended September 30 Flexible Budget Actual Results 560 Planning Budget 440 Liters of blood collected Medical supplies $ 7.788 $ 6.380 Lab tests 5,025 4.840 3.430 3.100 Equipment depreciation Rent 1.300 1 300 732 650 Utilities Administration 11.920 11,400 27 670 Total expense $ 30.195 $ The St. Lucia Blood Bank, a private charity partly supported by government grants, is located on the Caribbean island of St. Lucia. The blood bank has just finished its operations for September, which was a very busy month due to a powerful hurricane that hit neighboring islands causing many injuries. The hurricane largely bypassed St. Lucia, but residents of St. Lucia willingly donated their blood to help people on other islands. As a consequence, the blood bank collected and processed over 20% more blood than had been originally planned for the month. A report prepared by a government official comparing actual costs to budgeted costs for the blood bank appears below. Continued support from the government depends on the blood bank's ability to demonstrate control over its costs. St. Lucia Blood Bank Cost Control Report For the Month Ended September 30 Actual Planning Results Budget Liters of blood collected 560 440 Variances $ Medical supplies Lab tests Equipment depreciation Rent Utilities Administration 7.788 5,925 B.430 1,300 732 11 920 $ 6,380 4,840 3.100 1, B20 650 11,400 $ 27,670 $ 1,408 U 185 U 330 U G 82 U 520 U Total expense $ 30, 195 $ 2,525 U