Dockwiller Inc. manufactures industrial components. One of its products, which is used in the construction of industrial air conditioners, is known as D53. Data concerning this product are given below: The above per unit data are based on annual production of 8,000 units of the component. Direct labor is a variable cost. Refer to the original data in the problem. What is the current contribution margin per unit for component D53 based on its selling price of $150 and its annual production of 8,000 units