Around level 285 the costs invert (except the lemonade stands). The newspapers become the most expensive to upgrade and the oil the least expensive. I suspect it is an issue with the multiplier at that level.
Yes! I don't know how to fight but I'm gonna launch a random attack on the enemy base and then after calling for a non-existent medic I'm gonna keep running towards the enemy til I'm surrounded and and killed!
The worker moves when he's not being attacked and doesn't move when he's getting hammered. Maybe he thinks all those arrows and swords are helping him?
There is a small "clock" next to Stock button counting down one minute period