The network diagram of a project is shown as follows.

network

With the following information, the project manager hopes to crash the project by $1$ day.

Activity Normal time $($days$)$ Crash time $($days$)$ Crash cost per day

A $107$ $$850$

B $42$ $$75$

C $54$ $$240$

D $21$ $$800$

E $42$ $$300$

F $53$ $$350$

G $43$ $$100$

H $43$ $$190$

What is the cost of crashing?