If a consumer plans to spend 120k on four oranges but spent 80k, his consumer surplus is

Consumer surplus is the difference between what a consumer is willing to pay for a product or service and what they actually pay. In this case, the consumer planned to spend 120k on four oranges but spent 80k instead. If we assume that the consumer was willing to pay 120k for four oranges, then the consumer surplus would be the difference between what he was willing to pay (120k) and what he actually paid (80k), which is 40k. Therefore, the answer is N0.40 (40k/4).