Concept:Total employment is found by adding the number of workers in every trade listed in the table.Explanation:The trades are shoe making, mining, road transport, agriculture, and manufacturing goods.Total workers =300,000+25,000+160,000+225,000+165,000.Add the values step by step:300,000+25,000=325,000325,000+160,000=485,000485,000+225,000=710,000710,000+165,000=875,000So the total number of people employed under all the trades is 875,000.