Stellar transaction sample:
The fee for a transaction is the number of operations the transaction contains multiplied by the base fee, which is 100 stroops (0.00001 XLM).
Transaction Fee = (# of operations x base fee).
A transaction that allows trust on an account’s trustline (operation 1) and sends a payment to that account (operation 2) would have a fee of 2 x 100 stroops = 200 stroops or 0.00002 XLM.
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