Molly’s family has $3,000 set aside for an upcoming vacation. The family plans to spend 3/5 of this amount on gasoline for the drive and the motel rooms along the way and 1/2 of the remainder on meals. How much dose Molly’s family plan to spend on meals?

The family plans to spend 3/5 * $3,000 = $<<3/5*3000=1800>>1800 on gasoline and motel rooms.

This leaves $3,000 - $1800 = $<<3000-1800=1200>>1200 remaining for meals.
They plan to spend 1/2 * $1200 = $<<1/2*1200=600>>600 on meals. Answer: \boxed{600}.