5. The following datapertains to activity and costs for two months: TT MAYT T 10,000T 12,000TT 16,000T ? TT 13,000T ? TT T Manufacturing overhead T10,000T ? TT 39,000T 39,900TT AprilT T Activity level in units... T T Direct materials. T Fixed factory rent.. T Total cos.... T Assuming that these activity levels are within the relevant range, the manufacturing overhead for July was: a) 12,000e b) 10,000 c) 11,700 d) 7,700