Exhibit 2-3Michаel's Cоmpute-All, а nаtiоnal cоmputer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: Number of Laptops Sold Number of Days 0 - 19 5 20 - 39 15 40 - 59 30 60 - 79 20 80 - 99 10 Total 80 Refer to Exhibit 2-3. If one develops a cumulative frequency distribution for the above data, the last class will have a frequency of