A marketing research company desires to know the mean consumption of milk per week among people over age 3737. They believe that the milk consumption has a mean of 2.32.3 liters, and want to construct a 80%80% confidence interval with a maximum error of 0.060.06 liters. Assuming a standard deviation of 1.41.4 liters, what is the minimum number of people over age 3737 they must include in their sample? Round your answer up to the next integer.