Answer:
The price of calculator before 30 years = $30+$122.36 = $145.36
Explanation:
We have given price current price of calculator = $23
It is given that current price of calculator is after decrease of 532 %
We have to find the price of calculator before 30 years
The price of calculator will be more than 532 % from the current price
So 532% of 23

So the price of calculator before 30 years = $30+$122.36 = $145.36