Please don't give handwritten answers

A manufacturer of jeans wanted to understand the distribution of waist sizes in a particular market they had recently entered. They were able to source the data from a marketing consultant firm which had done a similar study before. The only hitch was the waist size intervals used in that study which did not conform to the sizes being sold by the manufactured in question. The consulting firm shared their report as given u. They had conducted the study for a sample of 1000 correspondents. Assuming that waist sizes are normally distributed among the population calculate the number of jeans the manufacturer should produce in the 37-39 range. The total number of jeans to be manufactured during the month is 100,000. Areas under the normal distribution curve for z=0.79 and z=1.66 are 0.2852 and 0.4515 respectively [6] Waist Size 28-30 30-32 32-34 34-36 36-38 38-40 40-42 42-44 Total Frequency 20 50 300 400 100 80 30 20 1000