The thing is I'm going on holidays to another state for about 3 weeks so I need to register my vehicle if a different state and that's why I'm surrendering my plate; but as I'll be back in less than a month I'd like to have my same plate and I also think the process would be easier than getting a new plate... so can I surrender my plates temporarily?
Yes, you can. See special procedures to surrender plates temporarily here: www.dmvtemporal.com
Based in the example case, I want to know how much refund will I get?
in the example, from the 137.50$ paid and if you surrender your vehicle plates during the first year of the registration, you'll qualify for a 30.25$ refund.