Larcker Manufacturing's cost accountant has provided you with the following information for January operations. Required: a. Prepare a gross margin income statement. b. Prepare a contribution margin income statement. Complete this question by entering your answers in the tabs below. Prepare a gross margin income statement. Required: a. Prepare a gross margin income statement. b. Prepare a contribution margin income statement. Complete this question by entering your answers in the tabs below. Prepare a gross margin income statement. Prepare a contribution margin income statement