The process analytics team at FroznFuudz is perplexed by the number of delays during production of their new custom manufactured frozen candy bars. So, they have set out to analyze the process but are time constrained. Therefore, they are resorting to process sampling. They estimate, based on a Delphi session with manufacturing managers, that about 1 out of every 5 orders requires special processing. How many process observations would they need to do over a span of a month to be 80% certain that their observations contain all process variations? Enter your answer rounded to the nearest whole number