Solve using Python:

The shares of three companies A, B, and C are 1 million won, 800,000 won, and 500,000 won, respectively. We want to find the amount required to purchase 3, 4, and 5 shares of these stocks, respectively. 1) Express the stocks' price and quantity as p vector and n vector, respectively and coded with NumPy. 2) The amount required to purchase stocks is expressed by multiplication, and the value is calculated by Numpy operation