MLM script 10 level depth 100 width

i want i small web based mlm(mlti level marketing) script for an educational institute . each student who is registered with institute will get a registration code ,when he refers other to join the institute the new student will give the reference of that student .the first student will get 10% comission of his selected course fees. this will go upto 3 levels ie for example the chain goes like this .. A>B>C>D>E these are students A who refer B ,B refer C and C refer D , D refer E. A will get 10% of fees of B , for C will ger 2% and for D 1%. same goes for B. B get 10% of c , 3% for D and 1% of E . also this same chain can be of any width at any [login to view URL] A himself can have refered 20 students so A will have chain like this A >B>C>D>E A >1>2>3>4 | | | UPTO N please reply fast its urgent . if any one have done this type of work before please send me the demo link. y budget is in between 50$-150$