Why not choose 1st weight 7 times to get maximum profit?

Why are we choosing the 1st and 7th wt. ? Instead we can choose 1st wt. 7 times to get max profit of 280, which is greater than 140 (1st and 7th)

Please reply anybody.
@amankumarkeshu?

@AKKI I think that someone else took this doubt and hasn’t responded. So I can’t see the question. Can you send me the link to the question so that I can help you.

How does this response thing work i never get a response on my doubt. It always goes down without any reply?