Change slider on the link above to $50

Hi, I am just trying to see if I can actually change the slider to $50 or any other amount and submit the form, perhaps using inspect element or something.

https://upgrade.plusgrade.com/offer/41a1e4cdFZ/offer/upgrade/wt81lpRjVKWZSsqQRjdrmMFNLA3MIZyczb?utm_content=main_button&lang=en