Rock Company acquired 90% of Soft Co. in 2019. During 2020, Rock purchased 3,000 units of Inventory for $100 each for cash and sold 2,000 units of them Soft for $150 each for cash. Soft Co. sold 1,500 units of these units to others for $200 each for cash. Both companies use perpetual inventory system. Required: a) Give journal entries Rock Company recorded for the purchase of inventory and resale to Soft Company in 2020. (9 points) b) Give journal entries Soft Company recorded for the purchase of inventory and resale to others in 2020. (9 points) c) Prepare the elimination entry needed to remove the effect of the intercompany transactions. (12 points)