$13-2.$ Optimal capital budget Marble Construction estimates that its WACC is $10$ percent if equity comes from retained earnings. However, if the company issues new stock to raise new equity, it estimates that its WACC will rise to $10\mathrm{.}8$ percent. The company believes that it will exhaust its retained earnings at $$2,500,000$ of capital due to the number of highly profitable projects available to the firm and its limited earnings. The company is considering the following seven investment projects:

$\backslash$table$[[$Project$,$Size,IRR$],[$A$,$$$1,000,000,20\%$