Final answer:
Majojo bought 8 sacks of oranges for sh 6400, sold 9/10 of them at a higher price, and made a profit of sh 2240.
Step-by-step explanation:
Majojo bought 8 small sacks of oranges at sh 800 per sack, which leads to a total cost of 8 * 800 = sh 6400. If one-tenth of the oranges were spoiled, he was left with 9/10 of the sacks to sell. He then sold these at sh 1200 per sack. To calculate the total revenue, we use the equation 9/10 * 8 * 1200 to get sh 8640. To determine if Majojo made a profit or loss, we subtract the total cost from the total revenue: sh 8640 - sh 6400 = sh 2240. Therefore, Majojo made a profit of sh 2240.