Editor's note: The following are questions received from listeners of "RealMoney Radio." To send Cramer a question about topics from his radio show, click here. Listen to Cramer's latest radio show by clicking here. Jim, is it realistic to make 5% per week in stocks? -- DJ from Michigan James J. Cramer: Unless you have psychic abilities, even making 5% per month on a regular basis is extremely difficult. If you were to make 5% a week in stocks, after two years you'd have multiplied your money over 150 times. I couldn't do that in my hedge fund in 14 years! Sorry, but the math just isn't adding up there. How do you calculate earnings per share? -- Jim from Florida James J. Cramer: Earnings per share is calculated by taking a company's net income, and dividing it by the number of diluted shares outstanding, which can be found on the company's income statement. Do you think Krispy Kreme (NYSE) will be taken over? -- Michael from Washington James J. Cramer: Even though the products at Krispy Kreme are great, I have no idea whether it will be taken over. In addition, I don't recommend stocks on the basis that they could get a bid unless the underlying fundamentals are good, and I am certainly not a fan of Krispy Kreme's fundamentals. Want more Cramer? Check out Jim's rules and commandments for investing from his latest book by clicking here.