Question 973848
I think this is 20.8x^2-458.3x+3500

The x-value for the vertex, minimum, is -b/2a, or  +458.3/41.6 and that is at 11.01 or 11.  That would be 1973.  It is $975.49



{{{graph(300,300,-1,30,-1000,4000,20.8*x^(2)-458.3x+3500)}}}