Tried to compute solution and could not figure out can someone pls help understand this solution please.

Tamarisk Corp. has been making and selling a variety of tabletops for many years. L'Adell, product manager for two versions of the company's tabletop products, Marbled and Solid, was comparing sales volumes for these two types of products. While she knew Tamarisk's sales for the Solid tops had been declining, she was surprised to see the competitors' tabletop sales had been increasing. Was there something she didn't understand about her products' costs? Tamarisk Corp. had always allocated MOH costs to its products using one cost driver: units produced. It made sense, as both products were of comparable size and went through the same process-though they did take different amounts of time in each area. She looked closely at the key activities and likely cost drivers and gathered the following information. Quantity of Cost Driver Activity Budgeted cost Cost Driver Marbled Solid Machining $162,400 Machine hours 2,500 3.300 Assembly 249,000 Direct labor hours 15,200 9,700 Quality control 80,300 Quality control hours 700 400 Total $491,700 Units produced 600 1,900 (a) * Your answer is incorrect. Calculate the plant-wide MOH rate if Tamarisk continues to use units produced as its only allocation base. Calculate the MOH costs per unit for each product: Marbled and Solid. (Round answer to 2 decimal places, eg. 15.25.) Plant-wide MOH rate $ 197 unit produced eTextbook and Media Save for Later Attempts: 2 of 3 used Submit Answer (b) The parts of this question must be completed in order. This part will be available when you complete the part above