in buying and selling of shares or stocks what does cost mean

Re: in buying and selling of shares or stocks what does cost mean

Aaap $200 kay stock thay jub aap nain khareeday thay …right?
aur ab unn hee stock ke market price $230 hai…right?
Ya kay aap nain woh stock baichay hain $230 raqm wasul ki ?
which is right?