Given that no pricing figures were located anywhere in the material researched for this site, confirming the live total at checkout is a required step, not an optional one.
Read every line of the checkout screen before submitting payment, since no baseline pricing was confirmed in advance to compare it against.
Screenshot the final order summary before you submit, so you have a documented reference point if a question about the charge comes up later.
Confirm the ingredient panel and correct serving directions at checkout before you order.
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