Can I get some help figuring out the molar mass of this acid?

I’m working on a lab that involves taking an unknown solid acid and mixing it with water, then titrating it with sodium hydroxide to find the equivalence point. The goal of the lab is to find the molar mass of the unknown acid using the data you get from the titrations. My professor told us that we’re supposed to get two different calculations for molar mass each of them I assume are supposed to be found in different ways. I figured out the molar mass once by taking determining the moles of strong base present at equivalence point but I’m not sure what the second method we’re supposed to use is. Sorry if this is an obvious question I’m missing somehow I missed a few days of lecture.