QUESTION 13 Which per unit cost does the slope of the total cost line re O Fixed O Variable. O Semivariable O Step-variable QUESTION 14 The monthly high and iow levels of direct labor hours and of total manufacturing overhead for Onyx Company are as shown: Direct Labor Mfg Highest observed level Lowest observed level Hours 8.000 4.000 Overhead $34.000 $26,000 6.corke sngowehead hould be aproxdmatelr in a month in which 6,500 direct labor hours are worked Onyxts manufacturing overhead should be approximatey $18.000. $28,000. $31.000 $35.000. QUESTION 15