The instrument height is $321\mathrm{.}65$ ft$.$ The computed elevation of the hinge point is $315\mathrm{.}22$ ft$,$ the previous rod shot taken was $9\mathrm{.}1$ ft$,$ the current rod shot is $9\mathrm{.}9$ ft$,$ and the daylight slope is $3$:$1$

How far do you need to move the rod from the current position to take your next shot?

Round answer to the nearest tenth of a foot $(0\mathrm{.}1)$

The right answer is $2\mathrm{.}4.$ Show the right step by step surveying process to get to $2\mathrm{.}4$