Caspian Sea Drinks is considering the purchase of a new water filtration system produced by Rube Goldberg Machines. This new equipment, the RGM$-7000,$ will allow Caspian Sea Drinks to expand production. It will cost $$12\mathrm{.}00$ million fully installed and will be fully depreciated over a $15$ year life, then removed for no cost$.$ The RGM$-7000$ will result in additional revenues of $$2\mathrm{.}71$ million per year and increased operating costs of $$678,720\mathrm{.}00$ per year. Caspian Sea Drinks' marginal tax rate is $26\mathrm{.}00\%.$ The internal rate of return for the RGM$-7000$ is $\_\_\_\_\_.$