Quote from varadi.balazs on January 20, 2026, 01:10

Hi Support Team,

I’m having serious multicurrency calculation issues between FOX – Currency Switcher Professional for WooCommerce (WOOCS) and WooCommerce Product Add-Ons Ultimate PRO (PluginRepublic).

Setup:

• WooCommerce store (Elementor, no cache/CDN, no optimization plugins)

• Only one currency switcher is used: FOX/WOOCS

• Product add-ons are created with WooCommerce Product Add-Ons Ultimate PRO

• Customer can switch between EUR (default), USD, GBP, HUF

The problem

Prices are correct in EUR, but when using other currencies the add-on option prices and totals become inconsistent and sometimes look like they are being converted multiple times (double conversion / wrong base currency handling).

Example product:

Split-finger Tab Calfskin – L size

Base price (EUR): 19

Option “ABS Spacer”: +9 EUR

Expected total: 28 EUR

Cart total: 28 EUR ✅ (Correct)

But in other currencies:

• USD:

  • Base price shows correctly: 22.06 USD

  • Add-on option stays “+9” (NOT converted)

  • Expected total should be: 22.06 + (9 EUR converted) ≈ 32.5 USD

  • Actual cart result becomes: 36.06 USD ❌

• GBP:

  • Base price shows correctly: 16.48 GBP

  • Add-on option stays “+9” (NOT converted)

  • Cart subtotal becomes incorrect ❌

• HUF:

  • Base price shows correctly: 7,316 Ft

  • Add-on option stays “+9 Ft” (obviously wrong)

  • Cart sometimes shows extremely large numbers (looks like double conversion) ❌

Additional symptoms

• Elementor mini cart subtotal does not update correctly after currency switch (product line prices can be OK, but subtotal stays in the wrong value/currency).

• If I enable FOX “show prices in other currencies” feature, sometimes EUR shows €0.00 while other currencies show correct values (so EUR becomes NULL/zero unexpectedly).

What I already tested

• Removed all custom MU plugins/snippets completely (clean test)

• The issue still happens, so it’s not caused by custom code.

• Currency switching itself works for normal product prices, but Product Add-On option pricing + cart totals are wrong.

• I also tried the compatibility snippet from your documentation for:

  “WooCommerce Product Add-Ons Ultimate by pluginrepublic.com”

  but it caused EUR add-on values to become 0 or did not fix the cart totals.

What I need from you

Please provide the correct and up-to-date compatibility fix for WOOCS + Product Add-Ons Ultimate PRO that ensures:

1. Add-on option prices are converted properly to the selected currency (USD/GBP/HUF),

2. The cart totals/subtotals are calculated correctly (no double conversion),

3. Elementor mini-cart subtotal updates correctly after switching currency,

4. The default currency (EUR) never becomes zero/null for add-on option values.

If this requires changes in specific plugin hooks/filters (instead of editing core files), please provide the recommended implementation.

Thank you in advance — I really need a stable solution because the current behavior breaks checkout totals in multiple currencies.