Diesel Engine Centrifugal Pumps

we need the above product price. if you give us the best price, we will submit this offer to our client. if the client accept it and open l/c direct to you, in that case how many percent of commission will you give us from this price. or can i add the commissions to your prices by myself? is it returnable to us? it an urgent for us. we will submit this offer with in this friday, otherwise we can’t participate in this offer.