AstraZeneca is the maker of the stomach medicine Prilosec. Suppose the companys management is concerned about the cost of its medicines. The companys internal audit department selected a random sample of $300$ purchases of Prilosec at drugstores and pharmacies in the United States. They wished to determine how much customers are spending on this medicine. In the sample, the mean price per $20-$milligram tablet of Prilosec was $$0\mathrm{.}30.$ The sample had a standard deviation of $$0\mathrm{.}08.$ Determine an estimate for the average range of costs for a tablet of Prilosec