The answer is C because, if you look at the graph you can see that there is four dots plotted so that already narrows your choices down to either 3(C) or 4(D).
Now that we have the answers narrowed down we have to match which graphs matches with all of the points on the line. You can see that all of the ones on graph 3(D) match.
. Thus, just plug in. 
Plug that into your calc to get $1832.