You found a report that stated that the equivalent annual worth of filter costs associated with a water treatment process were $125,000 per year for a certain 5-year period. The report stated that the cost in year 1 was $190,000 and the cost decreased by a uniform amount each year (i.e. arithmetic gradient) over that 5- year period, but it didn't say how much the decrease was each year. If the interest rate was 20% per year, what was the amount of the annual decrease (i.e. G)?