Three corporations (X, Y, Z) have preferred stock. The current stock price per share and dividend per share of the preferred stock of X, Y, and Z are shown below.
X: stock price = $50, dividend per share = $3
Y: stock price = $60, dividend per share = $4
Z: stock price = $80, dividend per share = $4
If you calculate the cost of the preferred cost stock (RP) for each and list these in order from HIGHEST RP to LOWEST RP, the correct order is _____.