Variant price not updating on shopify debut

[Lancelot]

Hi
Please I need help in my shopify store, the variant option I setup in the backend has various sizes and different prices but when I view it in the front view it doesn't change the price.

hhttps://partyheads.ca/collections/giant-head-cutout/products/giant-head-cutout 

[Propero]

if you have not made any customizations in code, just try to take a fresh copy of theme and check. Please do not forget to take a backup by duplicating the theme.

If the problem persist, you need to look at the java script code to fix this.

[Lancelot]

I have done that
After installing a new debut theme, it shows the variant price but after installing the formal one it doesn't show again

[Propero]

Looks like an issue because of thirdparty app script conflict ( magisto ???). Need to log in and check.