In a mine, 200 and 250 persons are deployed in the Panels A and B (shown in figure) respectively in the largest shift. The panels produce 400 and 500 tonne/day respectively. The resistances of panels A and B are 0.3 $\text{Ns}^2\text{m}^{-8}$ and 0.4 $\text{Ns}^2\text{m}^{-8}$ respectively and the combined resistance of shaft and trunk airways is 0.5 $\text{Ns}^2\text{m}^{-8}$. The operating static pressure of the fan in Pa to provide the minimum air quantities in the panels as per CMR 1957 is ______.