Functions and Validation

After reading the 2 pdf's of theory, Excel_Formulas&functions[8]-SUM, AVERAGE, PMT, IF, VLOOKUP.pdf and dataValidation_and_FormControls [9]_c.pdf I've looked over the PMT application I finished earlier this semester to review the practical skills. I finally got the hang of those buttons and slides and the VLOOKUP function. The practice file cand be found, as usual, at https://sites.google.com/site/economicinformaticsprojectsite/drafts