I believe the 120 items or $15,000 limit was set previously and was your selling limit from the last time you were active on eBay.
Recently, eBay announced additional zero insertion fee listings that are added to each subscription including non-store subscribers.
Since you recently subscribed to a starter store, you automatically have the 250 auction or fixed price listings but are limited to the 120 items/$15000 selling limit. I would suggest listing the 120 items, and requesting eBay to increase your selling limit.
https://www.ebay.com/help/selling/listings/selling-limits?id=4107#increasing
In your example, you have 76 items active (not sold yet) so you are allowed to list 44 more items before you hit your limit of 120 items listed/sold.
The 76 active items total $2,356.78 leaving you $12,643.22 selling limit over the 44 items that you can list. For example, you can list only 44 items at a price of $287.34 before reaching the $15,000 selling limit.
When you are at the point where you have reached the limit, again, make sure to request to increase the selling limit.
At this time, who knows? eBay may increase your selling limit to 1000 items when you have 250 free listings. Then, you’ll be paying for insertion fees beyond the 250 free listings.
