I've updated the corp mineral prices again. From now on they are the following, if you have a industry sheet update the prices (enough to update the market price) yourself:
Type Market Buy Price Corp Purchase Price
Tritanium 2,97 2,67
Pyerite 7,63 6,87
Mexallon 32,45 29,21
Isogen 56,23 50,61
Nocxium 83,80 75,42
Zydrine 1 180,00 1 062,00
Megacyte 2 150,00 1 935,00
Morphite 5 300,00 4 770,00