One rejected six$-$year project had cash flows of

Year $012345$

A $$$$10,000$ $$1,000$ $$2,000$ $$3,000$ $$4,000$ $$5,000$

One accepted project had cash flows of

Year $012345$

B $$$$10,000$ $$5,000$ $$4,000$ $$3,000$ $$2,000$ $$1,000$

If the management used solely IRR analysis to make decisions, what can you infer about the management's cost of capital estimate? $($Report your answer as the positive difference between the maximum and minimum possible costs of capital to at least $4$ decimal places.$)$