I have designed a complete electrical system to supply and control no of desert coolers located above roof level of a ceramic factory. The reason of the control is to organize the operation between the coolers and exhausts according to the mechanical scenarios per zones. We recommended the PLC rather than the BMS due to the industrial application where the PLC is recommended & the other main reason is due to the cost since the BMS is expensive than the PLC, the problem came when the bidders quoted $120,000 for the system, when i saw this i requested the bidders to provide the drawings and the quantities in item wise not in lumps. Could you evaluate the PLC price where the no of desert coolers #164 & no of fans #45 & all of the system supplied by #8 power panels?