as a carpenter, how do you price your services?

Cost plus the cost of accessory in addition to the cost of labor and transport any the total cost and then adding20 to40 Plumih of the cost added fare work and contract and vary the ratio in the market, according to the contractor that Ordti any other question e-mail me Belaest on Symbol e-science I am a carpenter and was held in Doha

 Of course,I priced it by meter square,I can calculate easily.