dont be confused with linear mtr or square mtr bud they both work out at roughly the same price all linear means is entire,keep to running mtr,if you buy a priceing format they work on linear and some show you the conversion at the bottom if you have any probs just drop me a thread
i only price by the square and like daddycool says there is very little in the end price , it is more important to make sure you can do the job for the price you have quoted.