Harappan civilizations were highly advanced for the time period?

Harappan cities had public sewage systems.

Harappans planned organized roads and interconnected alleys in towns.

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