Please provide Clear solutions

Paragraph Helmut Zemo Company manufactures several line or machine products. One unique part, a valve stem, requires specialized tools that need to be replaced. Management has decided that the only alternative to replacing their tools is to acquire the valve stem from an outside source. A supplier is willing to provide the valve stem at a unit sales price of Php20 if a least 70,000 units are ordered annually. The company's average use of the valve stems over the past 3 years has been 80,000 units each year. Expectations are that this volume will remain constant over the next 5 years. Cost records indicate that unit manufacturing costs for the last several year have been as follows: Direct materials Php3.80 Direct labor 3.70 Variable overhead 1.70 Fixed overhead" 4.50 Total unit cost Php13.70 ("Financial accounting depreciation accounts for two-thirds of the fixed overhead. The balance is for other fixed overhead costs of the factory that require cosh expenditures.) If the specialized tools are purchased, they will cost Php2,500,000 and will have a disposal value of Php100,000 after their expected economic life of 5 years. Straight-line depreciation is used for financial accounting purposes, but the sum of-years-digit method is used for tax purposes, The income tax rate is 10%. The sales representative for the manufacturer of the new tools states: "The new tools will allow direct labor and variable overhead to be reduced by 80 cents per unit or Php1 60 total reduction per unit. Another manufacturer, using identical tools and experiencing similar operating conditions, finds that annual production generally averages 110,000 units. This manufacturer confirms the direct labor and variable overhead savings. However, the manufacturer indicates that it did experience an increase in raw materials cost due to the higher quality of materials that had to be used with the new tools. The manufacturer indicated that its costs have been as follows; Direct materials Php4.50 Direct labor Variable overhead Fixed overhead Total unit cost Pho13.30 Required: a. Determine the annual net after-tax cash inflows available to the company if it purchases the new tools and manufactures the valve stems rather than purchasing the valve stems from the outside supplier. In this case the cash inflows will be from cost savings. b. By how much will the total after-tax cash inflows exceed the initial investment