Question 1208714
{{{system(a+c=5200,7.5a+4.5c=29.96)}}}


{{{system(a+c=5200,14a+9c=59.92)}}}


{{{9a+9c=46800,14a+9c=59.92}}}


subtracting first equation from second equation
{{{5a=-46740.08}}}
Telling that a is negative.
Something about your description is not right.



Was the tickets revenue really  $29961 ?