This is an exponetional function like 2^x(days)
If the month is 30 days, use 2^29 to get $5,368,709.12 or 536,870,912 pennies.
If the month is 31 days, use 2^30 to get $10,737,418.24 or 1,073,741,824 pennies.
I would much rather have $10.5 million than 1 million!