Therese bought 10 bags of buai at K400 each. She paid K2 000 for vehicle hire, and spent K1 000 on other expenses. She sold 8 bags at K900 each and 2 bags at K700 each. Calculate her total earning?

Cost of 10 bags of buai = 10 bags x K400/bag = K4,000
Total expenses = K2,000 (vehicle hire) + K1,000 (other expenses) = K3,000

Total earning from selling 8 bags at K900 each = 8 bags x K900/bag = K7,200
Total earning from selling 2 bags at K700 each = 2 bags x K700/bag = K1,400

Total earning = K7,200 + K1,400 = K8,600

Net profit = Total earning - Total expenses
Net profit = K8,600 - K3,000 = K5,600

Therese's total earning is K8,600 and her net profit is K5,600.

Step 1: Calculate the cost of buai

10 bags x K400 per bag = K4,000

Step 2: Calculate the total expenses

K2,000 (vehicle hire) + K1,000 (other expenses) = K3,000

Step 3: Calculate the total cost

K4,000 (cost of buai) + K3,000 (expenses) = K7,000

Step 4: Calculate the total earnings

(8 bags x K900 per bag) + (2 bags x K700 per bag) = K8,200

Conclusion:

Therese's total earnings are K8,200.