For each of the following independent cases, fill in the missing amounts in the table: (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable.) Case Direct Labor Rate Variance Direct Labor Direct Labor Efficiency Variance Spending Variance A $ 1,600 U $ 2,900 F B $ $ 1,150 F $ $ 1,850 F $ 1,800 U 3,500 F 4,200 U 2,800 U D $ $ 1,350 U 1,950 F $ F $ 1,500 U 2,000 U