Please include excel formulas

Ace Ventura Dophin Rescue company is growing and has computed the following expected cash flows for a new project. What is the discounted payback period (in years), if the initial cost is $300,000? The company must get all its money back within three years using an 11% discount rate , do you invest ?

	Year	Cash Flow
		(300,000)
	1	25,000
	2	129,000
	3	233,000
	4	337,000
	5	441,000