Does the growing number of interest groups support
Byrd's conclusion?

the answer is following :

Explanation:

Senator Byrd's conclusion is strongly supported by the rising number of interest groups. With more groups involved in lobbying and more money being spent to fund those efforts, Byrd's call for open, ethical practices will need to be enforced all the more.

hope so it is helpful to you  

the amount of the purse is, $120.

tax rate =9%

first find the the total tax she paid on the amount is equal to the 9% of $120 i.e,

now,

total amount paid by shalika = $120 +$10.8 = $130.8