I know you're supposed to spend 170K on barriers. Last week I had spent 38K on them. All night I bought barriers. I bought them, I fixed them, I upgraded them. I must have spent at least another 30K on them, probably a lot more. I look at my stats and it only went up 12K to 50K total. What gives?? Do you only get credit for upgrades? Is it just the initial purchase? It seems to me the total money spent purchasing/upgrading/repairing is not being counted. What's the best plan to get the Silverback unlocked? How should I be spending my coin?