Summarize data in collect

Hi openforeis team, I am getting every solution when I face a problem. I am becoming familiar with collect. Now I can design a simple form with collect. I know collect is intended to collect field data and not for analysis.However I have made a form that can produce a simple report on the go.This will help my user to understand the status of forest. They can get DBH class wise #tree/ha, timber(cum)/ha, firewood(cum)/ha, carbon(ton)/ha.These information are useful to interact with community to make idea for their forest management plan.Now I am needing those information in species wise manner. clearly, in example species, count/ha, SHO/ROB, 50, SHO/ROB, 20, ADI/COR, 30, ADI/COR, 30, My answer will be SHO/ROB, 70, ADI/COR, 60. How can I summarize my data with respect of species? Is their any study materials? or any idea that will help me.Thank you in advance.