Please consider using a simulation tool for repeatable results, free& easy: such as Python or even better F#..nice examples in a book e.g.
http://www.amazon.com/F-Quantitative-Finance-Johan-Astborg/dp/1782164626/ref=sr_1_1?s=books&ie=UTF8&qid=undefined&sr=1-1&keywords=quantitative+finance+f%23