betting maths problem

Hi all, I need a betting maths problem to solve. i take bets form my customer I offer them lower odds then what i get in the betting exchange, when they place a bet I have to place a bet as well in higher odds. Also my customer is in overseas so there is currency exchange rate applying. My betting account is in aud and they charge me 5% win commission Now the problem is how get the math right, The variables are. a. Current odd in the exchange: example 2.3 b. I want commission does not matter customer win or loos: example 5% c. Customer placing a bet : example 50000 tk d. Currency exchange rate: example 73 tk =1 aud e. Win commissions charge on my account is fixed : 5% f. What odd should I offer to the customer: ??????? g. What is the bet I should place to get equal profit: ???????? It might be very simple job so someone know the maths but not for me. Thanks