The customer bought a total of $1,108,000$ shares

and sold $900,000$ shares, currently holding

$208,000$ shares.

Placement: The customer purchased $620,000$

shares with a cost price of $1$

Buy $8,000$ shares: The customer purchased

$8,000$ shares at a price of $0\mathrm{.}8$ yuan.

Purchase of $480,000$ shares: The customer

purchased $480,000$ shares at a price of $0\mathrm{.}8$ yuan.

The total number of shares purchased is $620,000$

$+8,000+480,000=1,108,000$ shares.

The client sold the following stocks:

Sell $200,000$ shares: Sell at a price of $0\mathrm{.}76$

yuan.

Sell $200,000$ shares: Sell at a price of $0\mathrm{.}8$ yuan.

Sell $100,000$ shares: Sell at a price of $1\mathrm{.}11$ yuan.

Sell $100,000$ shares: Sell at a price of $1\mathrm{.}11$ yuan.

Sell $100,000$ shares: Sell at a price of $1\mathrm{.}1$ yuan.

Sell $100,000$ shares: Sell at a price of $1\mathrm{.}12$ yuan.

Sell $100,000$ shares: Sell at a price of $1\mathrm{.}2$ yuan.

Explain why the average cost price is $$1\mathrm{.}126.$