If I choose two crops from select multiple, then I will get two similar group of questions

Hello @Kal_Lam. If I choose two crops from select multiple, then I will get two similar group of questions. So, I get two different amount of fertilizer used for two selected crops. How could I add/sum them? Could you help me in this purpose?

@shuvra_dutta, could you share a dummy question and some dummy choices? Maybe you will also need to provide details on how it should proceed when they are selected.