Need help with questions on my Managerial Decisions final, problems 8 & 9.

Step TWO: Perform Calculations \& Explain Methods For each problem (found in Appendix A): 1. Use your plan of action to solve each problem found in Appendix A, clearly outlining the procedures used, providing a concise explanation of each step, labeling relevant formulas, and showing worked out calculations and complete solutions. You may use a calculator or Excel spreadsheet to help perform the necessary calculations, but all corresponding work must be shown completely. 2. Answer all questions posed in the problem; if applicable, analyze and evaluate your results and provide a contextual explanation of the solutions you obtained. 3. Review your calculations and solutions and make sure that an external viewer would be able to follow your methodology and make sense of your calculations and corresponding explanations. Make certain that you have completed all steps of each problem. Step THREE: Complete Checklist for Submission Before you submit your work, check to see if you have met the criteria noted below. Did you: Answer all parts of each question completely and accurately? Provide clear and accurate steps, calculations, and solutions? Include an insightful analysis and evaluation of results where relevant? Problem \#8: Using Relevant Revenue and Costs to Make Decisions Sandwiches Galore is a small shop looking to expand its product offerings. The company is evaluating two alternatives: tacos and soups. Annual projections for sales of tacos are as follows: Sales $144,000; variable costs $80,000; fixed costs $16,000. Annual projections for sales of soups are as follows: Sales Final Assessment: Outline and Rubric 7 $60,000; variable costs $20,000; no additional fixed costs. Required: Perform differential analysis to determine which alternative is more profitable, and by how much. Assume that adding tacos is alternative 1 and adding soups is alternative 2. Problem \#9: Activity Based Costing Roseville Engineering provides watershed and design services for its customers. Total overhead costs this coming year are expected to be $8,000,000($2,000,000 in the Watershed Department, and $6,000,000 in the Design Department). If the company chooses to use the plant-wide approach, overhead will be allocated using direct labor costs. Direct labor costs are expected to total $4,000,000. The Watershed Department expects to incur direct labor costs of $500,000, and the Design Department expects to work 120,000 direct labor hours. Required: a. Assume Roseville Engineering uses the plant-wide approach to allocating overhead costs, and uses direct labor costs as the allocation base. Calculate the predetermined overhead rate and explain how this rate will be used to allocate overhead costs. b. Assume Roseville Engineering uses the department approach for allocating overhead costs rather than the plant wide method. The Watershed Department allocates overhead based on direct labor costs and the Design Department allocates overhead based on direct labor hours. Calculate the predetermined overhead rate for each department and explain how these rates will be used to allocate overhead costs