Please explain how you got answer

Blair & Rosen, Inc. $($B&R$)$ is a brokerage firm that specializes in investment portfolios designed to meet the specific risk tolerances of its clients. A client who contacted B&R this past week has a maximum of $$50,000$ to invest. B&R$\text{'}$s investment advisor decides to recommend a portfolio consisting of two investment funds: an Internet fund and a Blue Chip fund. The Internet fund has a projected annual return of $18\%,$ and the Blue Chip fund has a projected annual return of $8\%.$ The investment advisor requires that at most $$25,000$ of the client's funds should be invested in the Internet fund. B&R services include a risk rating for each investment alternative. The Internet fund, which is the more risky of the two investment alternatives, has a risk rating of $5$ per thousand dollars invested. The Blue Chip fund has a risk rating of $5$ per thousand dollars invested. For example, if $$10,000$ is invested in each of the two investment funds, B&R$\text{'}$s risk rating for the portfolio would be $5(10)+5(10)=100.$ Finally, B&R developed a questionnaire to measure each client's risk tolerance. Based on the responses, each client is classified as a conservative, moderate, or aggressive investor. Suppose that the questionnaire results classified the current client as a moderate investor. B&R recommends that a client who is a moderate investor limit his or her portfolio to a maximum risk rating of $230.$