Calculate the slurry volume, slurry density, slurry yield, and percent mix of a $100$ sacks cement consisting of $60\%$ Class A cement, $40\%$ Pozomix cement, $6\%$ bentonite, $20\%$ silica flour $($S$.$G$.=2\mathrm{.}64),4\%$ FLA $($S$.$G$.=1\mathrm{.}3)$ and $10\mathrm{.}9ga\frac{l}{s}k$ of water. If density has to be decreased by $20\%,$ how much water is required for the $100$ sacks and what will be the final slurry volume?