Desarrollo :
1) Solución :
<img src="https://tex.z-dn.net/?f=%20P_%7Bventa%7D%20%3DC%20%2BG" />
Donde :
C : costo
G : ganancia
K : perdida
Entonces :
<img src="https://tex.z-dn.net/?f=2400%3DC%2B%20%5Cfrac%7B20%7D%7B100%7DC%20" />
<img src="https://tex.z-dn.net/?f=2400%3D%20%5Cfrac%7B20%2B100%7D%7B100%7D%20C" />
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B120%7D%7B100%7DC%3D2400%20" />
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B6%7D%7B5%7D%20C%3D2400" />
<img src="https://tex.z-dn.net/?f=C%3D%20%5Cfrac%7B%282400%29%285%29%7D%7B6%7D%20" />
<img src="https://tex.z-dn.net/?f=C%3D%20%5Cfrac%7B12000%7D%7B6%7D%20" />
<img src="https://tex.z-dn.net/?f=C%3D2000" />
2) Solución :
Articulo 1 :
<img src="https://tex.z-dn.net/?f=%20P_%7Bventa%7D%20%3DC%2BG" />
<img src="https://tex.z-dn.net/?f=360%3DC%2B%20%5Cfrac%7B20%7D%7B100%7DC%20" />
[img = 10]
[img = 11]
[img = 12]
[img = 13]
[img = 14]
Por tanto gano 60
Articulo 2 :
[img = 15]
[img = 16]
[img = 17]
[img = 18]
[img = 19]
[img = 20]
[img = 21]
Por tanto perdió 40
En resumen gano[img = 22].