Prob 3. Mabini company uses a standard cost system for its machine paced production of telephone equipment. Data regarding production during June follow: Variable overhead costs incurred, P155,100 Variable overhead costs applied at P12 per machine hour Fixed overhead cost incurred, P401,000 Fixed overhead budgeted, P390,000 Denominator value in machine hours, 13,000 Standard machine hours allowed per equiv. unit of output, 0.3 Equiv. units of output, 41,000 Actual machine hours used, 13,300 Ending work in process inventory, zero REQUIREMENTS: 1. Variable overhead spending 2. Variable overhead efficiency 3. Fixed overhead spending 4. Fixed overhead volume