Variable Cost Concept of Prosuct Pricing Voice Comv Inci produces and sells cellular phones. The conts of producing and selling 9.000 units of cellular phones are as followsi Voice cem desines a profit equal to a 15% rate of return on invested assets of 5560.000 . Astume that Veice Com, incu voer the varable cest cancept of applying the celt-ells approech te product pricing. a. Determine the variable cents and the variable cont amount per unit for the produstion and sale of 9,000 unta of cellular phenes. b. Determine the varuble coat markup percentage for cellular phones. c. Determine the seling ance of cellular phonet. Round to the nearest cent. per phone