can we keep multiple values for same key in a bundle in android ? if so how to get those values?

i was asked to design an app in android.

we have to take input of 3 numeric values and show some calculations in summary page.

i am able to do a simple application by taking the input details and passing them using bundles to summary page and doing calculations of average. (1 time entry information). but now, we want to add multiple times and summary need to give average of that. Please help me with this.