I need help with the following question for cost accounting. thanks.

Potato skins are generated as a by-product in making potato chips and frozen hash browns at Zeena Foods. The skins are sold to restaurants for use in appetizers. Processing and disposal costs associated with by-product sales are $0.06 per pound of potato skins. During May, Zeena Foods produced and sold 108,000 pounds of potato skins for $16,200. In addition, the joint cost for producing potato chips and hash browns was $65,600; separate costs of production were $38,400. In May, 90 percent of all joint production was sold for $255,200. Non-factory operating expenses for May were $38,280. a. Prepare an income statement for Zeena Foods assuming that by-product sales are shown as Other Revenue and the processing and disposal costs for the by- product are shown as additional cost of goods sold of the joint products. Note: Do not use a negative sign with your answers. Zeena Foods Income Statement For Month Ended May 31 Sales revenue (joint products) . $ Cost of goods sold: Joint cost ' $ Separate costs By-products Gross prot ' $ Nonfactory expenses Income from operations . $ Other revenues (by-product sales) ' Income before taxes ' $ b. Prepare an income statement for Zeena Foods assuming that the net realizable value of the by-product is shown as Other Income. Note: Do not use a negative sign with your answers. Zeena Foods Income Statement For Month Ended May 31 Sales revenue (joint products) l $ Cost of goods sold Gross prot $ Non-factory expenses Income from operations 3 Other income (by-product sales) l Income before taxes l 35 l c. Prepare an income statement for Zeena Foods assuming that the net realizable value of the by-product is subtracted from the joint cost of the main products. Note: Do not use a negative sign with your answers. Zeena Foods Income Statement For Month Ended May 31 Sales revenue Cost of goods sold Gross prot Non-factory expenses Income before taxes