Expired tabs is a nonmoving offense that won't affect your insurance, though you should not ignore the tickets or you would face licensing consequences.
Also, an officer can choose to impound (tow) your vehicle if the tabs are expired for more than 45 days. You should get current tabs so that you avoid more tickets. As for fighting the tickets, it's up to you but it is probably a waste of time given the amounts and given that these tickets will not affect your insurance. Good luck.
This answer is given merely for informational purposes and does not create an attorney-client relationship. For specific advice, contact an attorney in your state to see if working together makes sense.
If you can show that you have the actual license tab in your possession but has not affixed it to the license plate, the court likely will reduce or entirely dismiss the ticket.
However, to get to that point, in most places, you would need to be sitting in court for usually two or three hours. You need to add the time you will be spending driving to and from the court.
If you have to take time off from work, how much is that time worth to you?
I agree with both previous answers and you should mitigate because you appear to have comitted the infraction, but had paid the tabs and had an excuse.
Only If and until you and I sign an Agreement for Legal Services, I am not your attorney. These answers are provided for informational and/or novelty purposes