Rockwood Manufacturing typically achieves one of three production levels in any given year: 2 million pounds of steel, 3 million pounds of steel, or 5 million pounds of steel. In tracking some of its costs, Rockwood Manufacturing's controller discovered one cost that was $8 per pound at all production level. This is an example of a a. Fixed cost b. Variable cost C. Semivariable cost d. Semifixed cost ii. Joe's Manufacturing typically achieves one of three pro ction levels in any given year: 5 million pounds of steel, 10 million pounds of steel, or 15 million pounds of steel. In tracking some of its costs, Joe's controller discovered one cost that was $ 9 per pound at a production level of 5 million pounds, $4.5 per pound at a production level of 10 million pounds, and $3 per pound at a production level of 15 million pounds. This is an example of a a. Fixed cost b. Variable cost C. Semivariable cost d. Semifixed cost