Prices with decimal wont recognized

Hello i have a problem. B2B King cant recognize price with decimal "," . When i go to woo settings and turn currency settings to display decimal as "." and after that go to product and refine price for group as "." they work well.

for examle when i use 17,70 it shows 17,00 and when using 17.70 it shows 17.70

Please i need urgent fix for this one. Thanks