I need advanced calculation.

@Dimitris @Grace - at the moment, the logic manipulations to determine the Highest scoring element are reasonably easy to calculate ie out of the 5 which is the highest but to determine the ordinal ranking of the others takes you into a massive loop of logic that is extremely complicated and not something that ‘native typeform logic’ can easily handle (if at all in my opinion though i have tried to make this work many times over the past two years and have given up after about 350 logic rules for ranking 5) 

and if there is a tie for high score, what do you do then - go to a tie breaker? or are all the services priced uniquely ie none at the same value?

connecting to a google sheet or some other backend may be the best way to write the data and then run a macro/routine over the data record to determine the ranking and then pass them back via the API into a second form that takes the 5 ordered variables and applies the discount using the logic rules inside your typeform. 

@mathio did something like this in a post to look up ‘price of a phone’ in this post - check out his example at the tail end of the thread… it is likely that you could so something like that in this case.