How much is the average flowmaster and installation cost?

i want to buy and have flowmaster 40s and the whole set up installed on my truck but i need to know how much this is going to be|||It depends on your vehicle type , single or dual outlet? (tail pipes) 1 muffler or 2 ? stainless tips? size of pipes? give more info plzz. I will say it could be from 150.00 to 600.00