[Closed] WPML Multicurrency

Background of the issue:
I am developing a site using WPML and my payment gateway provider only charges in my base currency. I want to display different currencies on the site but switch to the base currency at checkout. Ideally, the cart would show converted pricing, but checkout would show the base currency. I am also open to changing the currency to the base currency on the cart page if necessary.

Symptoms:
I am unable to display different currencies on the site while ensuring the checkout page shows the base currency.

Questions:
Is there any way to show different currencies on the site and switch to the base currency at checkout?
Can the currency change to the base currency on the cart page instead?