Solomon bought 20 marbles from his friend Johanna and added them to a store that had 50. If his father also gave him 2/5 times as many marbles as he bought from Johanna, and each marble weighs 2kgs, calculate the total weight of marbles Solomon has in the store.
After buying twenty marbles from his friend Johanna, Solomon had 20+50 = <<20+50=70>>70 marbles.
Solomon's father gave him 2/5*20 = <<2/5*20=8>>8 more marbles.
Adding Johanna's and Solomon's marbles, he has a total of 8+70 = <<8+70=78>>78 marbles.
If each marble weigh 2 kgs, the total weight of marbles Solomon has in store is 78 * 2 kgs = <<78*2=156>>156 kgs
#### 156