Which one of the following correctly defines the retention ratio?

	Equity rises $500,000; net plant and equipment falls $500,000
	Cash rises $500,000; net plant and equipment falls $200,000; equity rises $300,000
	Cash rises $500,000; accounts receivable falls $200,000; goodwill rises $350,000
	Cash rises $500,000; net plant and equipment falls $500,000