You bet

[Couch Potatoe]

means You can bet money on that, showing that you are 100 percent agree with what another one has just said, and you think what he/she had said is true.

[Tanya Shivari]

Youre welcome (informal, Upper Midwest)

[Donald Trump]

Said when one is 100% for the cause, even if the cause is unknown. Also said to make the leader feel they have a persons 100% trust, even if not entirely true.

[Becky]

Yes, sure, surely.

You´re welcome.

[Jessica]

(the form you betcha is connected with rural image) certainly