Error on price with product option

Hi all,
I found an error on price with product option. 

I create product price 8500
then add product option 
S + 0
M + 1000
L + 2000
When we select option L on frontpage 
Price view  $,500

Like this in demo site
product purple-duck-copy-p-6

This error found in mobile & desktop full page view.
Not in desktop windowed view
What is the currency value of the store currency?
Hi tim. It was default value in demo site
- Setting regular price without tax & discount
- Option product increase price
Error when regular price 3 digit then select option price increase 4 digit for example
Does this issue only concern a certain mobile web browser?