Answer:
This month I guess I should plan on paying $65.135.
Step-by-step explanation:
Over the past 4 months, the amount we paid for postage increased by 1% per month.
Now, in the past month we paid a total of $64.49 for postage.
Therefore, in this current month we have to pay for postage [tex] 64.49(1 + \frac{1}{100}) = 65.1349[/tex] dollars.
Hence, this month I guess I should plan on paying $65.135. (Answer)