Using the information in Exhibit 7, determine the variance between total actual costs (column A) and Budget Authorization total (column E) for the total direct labor and overhead (line 26) and for the four subtotals on this chart (line 3- total DL; line 6- total hourly indirect labor; line 9 total salary; and line 25 total other OH). Considering all the remaining information on this exhibit, give me a very brief summary of what you know about the cause of each of the subtotal variances.