This is not cumulative. You need to have 99 peanut butter jars. Probably the fastest way is to keep playing stage 1, getting as many peanuts as you can. It should take about 3 hours to go from 0 to 99.
Here's a video of how to do this quickly. My best run is 2:23.6 but realistically, you should end up somewhere around 2:30~2:35 by following a strategy similar to my run below.