An org tracks customer orders on an Order object and the items of an Order on the Line Item object. The Line Item object has a MasterDetail relationship to the order object. A developer has a requirement to calculate the order amount on an Order and the line amount on each Line item based on quantity and price.
What is the correct implementation?
A . Implement the line amount as a numeric formula field and the order amount as a roll-up summary field.
B . Write a single before trigger on the Line Item that calculates the item amount and updates the order amount on the Order.
C . Implement the Line amount as a currency field and the order amount as a SUM formula field.
D . Write a process on the Line item that calculates the item amount and order amount and updates the filed on the Line Item and the order.
Answer: A
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