Final Answer:
The net effect on income for the period ending March 31, 2019, after recording the required adjustments, is an increase of $12,000. Option A is the answer.
Step-by-step explanation:
Sales Shipped Before March 31: The auditor identifies sales of $20,000 that were shipped before March 31 but recorded after shipment.
Adjusting for these sales adds $20,000 to the income.
Adjusted Income: +$20,000
Sales Recorded Before Shipment: The auditor notes sales of $8,000 that were recorded before shipment but shipped after March 31. Adjusting for these sales reduces income by $8,000.
Adjusted Income: - $8,000
Net Effect:
Adjusted Income (+$20,000) - Adjusted Decrease (-$8,000) = Net Increase of $12,000
Therefore, the correct answer is an increase of $12,000, and option A is the answer.