The four questions are attached. I would greatly appreciate any and all help I can get. Thank you!

GIVEN: Kann Corporation produces industrial robots for high-precision manufacturing. The following information is available: Per Unit Direct materials $25.00 Direct labor $10.00 Variable manufacturing overhead $6.00 Fixed manufacturing overhead Variable selling and administrative costs Fixed selling and administrative costs Total $36,000 $4.00 $15,000 The company has a desired ROI of 20%. It has invested assets of $420,000. It anticipates making and selling 3,000 units per year. REQUIRED: Part 1: Using the total (full) cost concept, determine the (a) unit cost amount; (b) markup percentage; and (c) unit target selling price. Part 2: Using the product (absorption) cost concept, determine the (a) unit cost amount; and (b) markup percentage. Part 3: Using the variable cost concept, determine the (a) unit cost amount; and (b) markup percentage. Part 4: What is the target unit selling price under the three cost assumptions