Alice and Mike file a joint return for $2023$ on April $15,2024.$ Alice, who is a nonworking spouse, is $49.$ Both Alice and Mike contributed $$2,000$ each to a traditional IRA, although they qualified to contribute the maximum amount. They filed their return timely. On June $1,2024,$ Mike$$s mother gave each of them $$1,000.$ What additional amount of the gift may Alice and Mike contribute to each of their IRAs for the year $2023?$