Answer:
$900
Explanation:
Inflation is the general increase in price levels per period. It erodes the purchasing power of a country's currency. An inflation rate of 10% means that the currency's value has decreased by 10%.
In this case, if the school fees went up as inflation, the implication is an increment of school fees by 10 percent.
Johanna will have to increase the fee by 10%
i.e., 10% x 9000
=10/100 x 9000
= $900
