The mass of container is 50 g when it is empty. When we complete this container with water, its mass is becoming 130 g.

The mass of container is 50 g when it is empty. When we complete this container with water, its mass is becoming 130 g. If we unload half of this water and put a liquid which its density is 2 g/cm3 instead of this water, find the sum of the mass of this container (density of water is 1 g/cm3).