Answer this question correctly or you should stop trading and start hodling.

A man bought a cat for $50

He sold it for $60

He then bought the same cat for $70

Then resold it for $80

How much did he make?

No dey twist things, na $20.

So far $50 was not stated to be the fixed cost of the cat.

He made no gain.

The first gain of same $10 he made from the previous transaction was not enough for the second transmission, hence he added a $10 (probably borrowed) to the sales price of $60. He only recoupe his cost of investment.

Hahjascho:
No dey twist things, na $20.

So far $50 was not stated to be the fixed cost of the cat.