Generally, the order of cost, from the least expensive to the most expensive, for long-term capital of a company:
a) preference share capital, retained earnings, ordinary share equity capital, new ordinary share equity capital.
b) ordinary share equity capital, preference share capital, long-term debt, short-term debt.
c) new ordinary share equity capital, retained earnings, preference share capital, long-term debt.
d) long-term debt, preference share capital, retained earnings, new ordinary share equity capital.