QUESTION 16 Midend's Camera Shop has prepared the following flexible budget for September and is in the process of interpreting the variances. F denotes a favorable variance and U denotes an unfavorable variance. Flexible_Variances Material A $29,000 $1,200U $1,900F Material B 37,000 800F 700U Material C 44,000 1,500U 2,500F The explanation that lower-quality materials were purchased is most likely for Material A O Material B O Material C both Material A and C