Multiple suggestions (fertilizer, crop quality)

[Leonord-github]

Hello I wanted to give a couple suggestions to make the planner actually usable endgame. I dont know if it was always like this or something broke.

1. Fertilizer prize is not accounted for and it should.

2. Crop quality is ignored for some reason. I find it strange given that the planner allow us to input our farming level to influnce the quality chances. Farming level plus fertilizer should influence the final sell value. This would be easy to do.