A nice name - I see that the somewhat similar CalculateDebt in com went for $2588 (according to GoValue, not in Namebio) while CalculateLoans went for $155 (back in 2012). The latter maybe reduced since a plural. So I think the range is somewhere from mid $$$ to lowish $$$$. It would be an ideal name for an online calculator that showed how much one needed to save at various rates of return to produce a pension of a given amount, or similar calculations. I don't have a good feeling how hard it will be to sell. Good luck!