Line-based formula
Multiply active lines by credits per line and credit denomination.
Ways and fixed-bet games
Use the displayed total bet because the game may scale ways internally.
Feature and ante costs
A feature buy, extra chance or jackpot side contribution can increase the wager separately.
Check speed as well as size
A small spin repeated quickly can exceed a time-based budget. Set both cash and session limits.
Quick answers
Is denomination alone the spin cost?
No.
Where is the authoritative total?
The final bet meter.
Can optional features add cost?
Yes.