What was the "preferred" method of delousing (getting rid of lice)?

shaving your head

Explanation:

Covering it and washing it helps or wearing a wig

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