A work cell is required to make $300$ computerized diagnostic assemblies $($for installation into hybrid automobiles$)$ each day. The cell currently works an eight hour shift, of which $6\mathrm{.}3$ hours is available for productive work. What is takt time for this cell?

A$)96$ seconds B$)0\mathrm{.}77$ seconds C$)46\mathrm{.}15$ seconds D$)78$ seconds E$)75\mathrm{.}6$ seconds