Periodically ask your business volunteers to review the price sheets and update them. Updating several areas every year works well. When you update cars don't forget to update license and insurance as well. Houses must cover utilities as well. Consider factoring in a student loan for any student in a career that requires training beyond high school.
Student loans are a Reality too.
The financial aid once at any postsecodnary institution can provide you with an average student loan amount per year. Figure the loan based on the number of years of schooling required. Be realistic about student salaries. For instance, the student wishing to be a physician at the age of 28 will be serving their residency at a much reduced wage. They will not likely be a full fledged doctor, however dentist and optometrist are 5 year programs.