My heli booster from lab expired...So heres the latest update with the totals prior to the the "generous customer" in lab booster: an order totaling 915 coins ( with the events 20% bonus).
After the lab booster is applied it totals 1742 coins.
If i did the math equation correctly... which i doubt 😫... it works out to: the original total coin prior to the 20% multiplied by 2 ( the lab booster) and then the 20% event bonus is applied.
If there's a math wiz out there, feel free to jump in..