Yes, it's just a suggested donation to the Building Tomorrow charity, you can donate whatever you want.

Just click the email link, and change the amount in the subject line to whatever you want. You get an email back from Square with instructions on how to complete the transfer.

Or donate via PayPal at http://www.buildingtomorrow.org/donate/ if you're more comfortable with that.

Hi! Absoulutely! Anything you can donate would be phenomenal. Thank you so much.

Why not? Sure thing.