Modify software calculator.

EXPERIENCE IN BETFAIR/TRADING FOOTBALL IS A MUST I need modification to the existing calculator, and the ability to store profit loss on the software for the remaining time of the game. The calculator needs to be able to calculate stakes according to different profits per scoreline. Once stakes have been calculated I can then place that trade as DEMO in the software.. the software will then keep track of all profit and loss on scorelines for the remaining time of the game. It will display profit and loss just like on betfair next to each scoreline. But we can calculate the stakes according to profit entered. For example: I type in desired profits scorelines: 0-0 £50 0-1 £150 0-2 £75 The calculator will then calculate the stakes to make these profits. Whilst showing what loss I will endure if other scorelines are the final result. I can then "place" those trades, and then begin to use the calculator again on the same game.. but add to the profits or losses shown on the calculator.