4. After conducting a market research study, Schultz Manufacturing decided to produce a new interior door to complement its exterior door line. It is estimated that the new interior door can be sold at a target price of $60. The annual target sales volume for interior doors is 20,000 . Schultz has target operating income of 20% of sales. What is the target cost? A) $800,000 B) $960,000 C) $1,440,000 D) $1,600,000 E) $768,000