@Alice683 It might have something to do with your payment method. If Airbnb is wire-transferring your payments to Ghana (?), there could be international transfer fees from any of the intermediary banking institutions, currency exchange fees, and exchange rates that change daily affecting your payout.
It's often the case that an international transfer fee is levied as a flat rate before it's received by your bank. Several hosts I've spoken to based in Africa and India have found that the best way to protect more of their earnings is to set a Minimum Payout Amount - see here: https://www.airbnb.com/help/article/824/
This setting bundles your payouts together and does not transfer them until they meet the target amount you set. That way you don't have to pay a flat fee on top of each individual transaction.