Which of the following statements is correct: Direct costs are traced using a budgeted rate, and indirect costs are allocated using an actual rate. The formula determining cost of goods sold in a merchandising entity is Beginning inventory + Purchases + Ending inventory = Cost of goods sold Fixed costs are fixed per unit. When using a normal costing system, manufacturing overhead is allocated using the budgeted manufacturing overhead rate and the actual quantity of the allocation base. What is the appropriate journal entry if direct materials of $15,000 and indirect materials of $6,000 for a job are sent to the production line? a. Cr Work-in-Process Control 21,000 Dr Materials Control 21,000 b. Dr Work-in-Process Control 15,000 Dr Manufacturing Overhead Control 6,000 Cr Materials Control 21,000 C. Dr Work-in-Process Control 21,000 Cr Materials Control 21,000 d. Dr Manufacturing Overhead Control 6,000 Dr Materials Control 15,000 Cr Work-in-Process Control 21,000 a. If a company has a degree of operating leverage of 5.0 and sales increase by 30%, all else being equal then: operating profit before tax will increase by 150% Ob.operating profit before tax will increase by 35% Oc. total variable costs will not change O d. total variable costs will increase by 150%