Sam buys 100 shares of Acme stock at $100 per share on January 1, Year 1. At the end of the first year (December 31, Year 1), she buys 100 more shares at $120 per share. At the end of the second year (December 31, Year 2), she buys another 100 shares for $135 per share. The stock pays a dividend of $2.00 per share on December 29th of each year. Acme is trading at $169.80 as of December 31, Year 3. What is the time weighted return for Acme since January 1, Year 1 to today

You are the manager of a large crude-oil refinery. as part of the refining process, a certain heat exchanger (operated at high temperatures and with abrasive material flowing through it) must be replaced every year. the replacement and downtime cost in the first year is $165 comma 000. this cost is expected to increase due to inflation at a rate of 7% per year for six years (i.e. until the eoy 7), at which time this particular heat exchanger will no longer be needed. if the company's cost of capital is 15% per year, how much could you afford to spend for a higher quality heat exchanger so that these annual replacement and downtime costs could be eliminated?