#Periods	Payment	Present Value	Future Value	Type	Guess	Result
48,		-200,	8000,						0.007701472488201
60,		-6000,	120000,						0.046781916422493
60,		-1000,	120000,						-0.020442952219357
24,		-250,	5000,						0.0151308439023434
24,		-250,	5000,		NULL,		1,		0.0165501190667120
208,		-700,	8000,						0.0874999976840937
10,		-1000,	6500,						0.0871137556058636