Ejercicio 2 (VPN)

                                   proyecto A      proyecto B     proyecto C
inversion inicial         $90,000           $490,000        $20,000
Año                            Entradas en efctivo(FE)                      
1                                 20,000             150,000          7,500
2                                 25,000             150,000          7,500
3                                 30,000             150,000          7,500
4                                 35,000             150,000          7,500
5                                 40,000             150,000          7,500

proyecto A = 22.5%

VP=20000/(1+.225)^1+25000/(1+.225)^2+30000/(1+.225)^3+35000/(1+.225)^4 + 40000/(1+.225)^5=

VP=16326.53061+16659.72511+16319.73072+15542.00069+14500.38548

VPN=79,348.97261-90000= -10,651.02739

proyecto B = 21%

1-1/(1+.21)^5/.21

1-1/2.59374246/.21

1-.385343289/.21

.61445671/.21= 2.925984336

VP=2.925984336*150,000= 438,897.6504

VPN=438,897.6504-490,000=  51,102.3496


proyecto C 20%

 1-1/(1+.20)^5/.20

1-(1/2.48832)/.20

(1-0.401877572)/.20

.598122428/.20= 2.99061214

VP=2.99061214*7500(anualidad)=22429.59105

VPN=2242959105-20000(inversión inicial)= 2429.59105