I purchased bit tech for some of my countries in FFA via control panel but although all bought exactly same amount of techs at same price some countries paid 1-2 bucks less than others.

purchased 25,000 Business, 25,000 Residential and 25,000 Agricultural for $178,344,998.

purchased 25,000 Business, 25,000 Residential and 25,000 Agricultural for $178,344,999. (that happened twice and each time to different country)

and what others paid:

purchased 25,000 Business, 25,000 Residential and 25,000 Agricultural for $178,345,000.