A stationery store wants to estimate the total retail value of the 1,000 greeting cards it has

Question:

A stationery store wants to estimate the total retail value of the 1,000 greeting cards it has in its inventory. Construct a 95% confidence interval estimate for the population total value of all greeting cards that are in inventory if a random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.