For each of the following independent cases, fill in the missing amounts in the table:

Note: Indicate the effect of each variance by selecting $"$F$"$ for favorable, $"$U$"$ for unfavorable, and "None" for no effect $($i$.$e$.,$ zero variance$).$

$\backslash$table$[[\backslash$table$[[$Case$],[$A$]],\backslash$table$[[$Direct Labor Rate$],[$Variance$]],\backslash$table$[[$Direct Labor Efficiency$],[$Variance$]],\backslash$table$[[$Direct Labor Spending$],[$Variance$]]],[$$$,1,500,$U$,$$$,2,700,$F$,,,],[$B$,$$$,1,250,$F$,,,,$$$,2,000,$U$],[$c$,$$$,1,750,$F$,,,,$$$,3,300,F$