Cash Flow Estimation Estimate the free cash flow of 2019 under the following assumptions. Assumptions: 1. Year 2019 sales projection: $31,556,000,000 2. All the other income statement accounts are assumed to hold a constant percentage as sales. The percentage is the average percentage of fiscal years 2016, 2017 and 2018. 3. Investment in net operating working capital and capital expenditure are assumed to stay perpetually as the average of year 2017 and 2018