Eastern Electric is offering 2,100 shares of stock in a Dutch auction. The bids include: 1,400 shares at $32 per share, 1,500 shares at $31 per share, 1,400 shares at $30 per share, and 900 shares at $29 per share. How much cash will Eastern Electric receive from selling these shares? Ignore all transaction and flotation costs.

the answer is 2100 x 30

why we chose 30 please explain in a clear way