$4.$The manager of repairs and maintenance department in response to a request, submitted the following budget estimates for his department, that are to be used to construct a flexible budget to be used during the coming budget year:

$\backslash$table$[[$Details of cost$,\backslash$table$[[$Planned at $6,000$ repair$],[$hours$]],\backslash$table$[[$Planned at $9,000$ repair$],[$hours$]]],[$Employees salaries,$30,000,30,000],[$Indirect repair materials,$40,200,60,300],[$Miscellaneous cost$,13,200,16,800]]$

Prepare a flexible budget for the department up to activity level of $10,000$ repair hours $($use increments of $1,000).$