when you do the calculation in chrome it returns the result fine if you do it in IE it doesnt display correctly….
work ok in both IE and chrome with a different theme
I hope you are well today and thanks for posting here.
This question and developing custom code for custom functionality is beyond the scope of support that we provide here. Please see https://themeforest.net/item/jevelin-multipurpose-premium-responsive-wordpress-theme/14728833/support
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Shufflehound recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5