'Shillings' in the Bible

But that servant went out, and found one of his fellow-servants, who owed him a hundred shillings: and he laid hold on him, and took him by the throat, saying, Pay what thou owest.

But he answered and said unto them, Give ye them to eat. And they say unto him, Shall we go and buy two hundred shillings worth of bread, and give them to eat?

For this ointment might have been sold for above three hundred shillings, and given to the poor. And they murmured against her.

A certain lender had two debtors: the one owed five hundred shillings, and the other fifty.

And on the morrow he took out two shillings, and gave them to the host, and said, Take care of him; and whatsoever thou spendest more, I, when I come back again, will repay thee.

Philip answered him, Two hundred shillings worth of bread is not sufficient for them, that every one may take a little.

Why was not this ointment sold for three hundred shillings, and given to the poor?