'1990' is necessary information, we don't need to know the year (unless it's the true value, in which case the process is entirely different.)
first, take 1% of $9360:
[tex] \frac{9360}{100} = 93.6[/tex]
Then multiply that by 6.5:
[tex]93.6 * 93.6 =608.4[/tex]
That's quite a commission!
