If you want 100mg/ml and you have 2000mg of hormone, you need 20ml (2000mg/100mg/ml is 20) total solution. You must use all of bottle 1 which is 5ml in a 2gF kit. You must use 5ml of bottle 1 solution for every 2000mg of hormone you have. 2000mg of hormone takes up 2ml so now you have 7ml. 20ml total needed - 7ml used means you need 13ml from bottle 2. Bottle 2 had 21 ml so 21ml minus 13ml means you take out 8ml from bottle #2.

If you want 100mg/ml and you have 4000mg of hormone, you need 40ml (2000mg/100mg/ml is 40ml) total solution. You must use all of bottle 1 which is 10ml in a 4gF kit. 4000mg of hormone takes up 4ml so now you have 14ml in bottle #1. 40ml total needed minus 14ml means you need only 26ml from bottle number 2. In bottle number 2 was 41ml so you need to take out 15ml.

If you want 150mg/ml and you have 2000mg of hormone, you need 13.3ml (2000mg/150mg/ml is 13.3) total solution. You must use all of bottle 1 which is 5ml in a 2gF kit. You must use 5ml of bottle 1 solution for every 2000mg of hormone you have. 2000mg of hormone takes up 2ml so now you have 7ml. 13.3ml total needed minus 7ml used means you need 6.7ml from bottle 2.

If you want 200mg/ml and you have 2000mg of hormone, you need 10ml (2000mg/200mg/ml is 10) total solution. You must use all of bottle 1 which is 5ml in a 2gF kit. You must use 5ml of bottle 1 solution for every 2000mg of hormone you have. 2000mg of hormone takes up 2ml, so now you have 7ml. 10ml total needed minus 7ml used means you need 3ml of oil from bottle 2.

As reference 1 cart= 2 grams of Fina.