Balanced Load

Daniel Tucker has three ore carts almost ready to take out of the mine. The first one is fully loaded, the second one is half full and the third one is a quarter of the way full. Daniel adds 60lbs to the carts and all three are fully loaded. What is the weight of the ore when all three carts are fully loaded? The answer can be used as a promo code for 10% off a puzzle room experience. The code is valid until October 1, 2022.