Habey Olayimika Wrinky Sector

In practice,there are things called B o Q ( bill of quantities),tendering and estimations,Material detailing, variations, miscellaneous,etc
All those are to be verified and considered before taken on a certain project,this gives actual or average cost per section,klm, SQm,even in inch!!!
How would you on earth explain to a client that you don't have a proposed per measure price and you kept disbursing funds!!!it's simply a fraud!