Can someone explain how to work out this vectors problem?

Use trigonometry to determine the magnitude of the horizontal component of the resultant vector from the following 6 component vectors: V1 = 10 units @ 180 degrees, V2 = 30 units @ 0 degrees, V3 = 20.8 units @ 0 degrees, V4 = 50 units @ 60 degrees, V5 = 30 units @ 240 degrees and V6 = 10 units @ 60 degrees. Display your answer to 1 decimal place