The artificial sweetener aspartame is a derivative of the dipeptide asp-phe.If aspartame (asp-phe) was prepared from racemic amino acids,how many stereoisomers (diastereomers + enantiomers) could be formed? 
Definitions:
Materials Price Variance
The difference between the actual cost of materials and the expected (or standard) cost, indicating how efficiently materials are being purchased.
Standard Price
A predetermined price that a company aims to pay for materials, labor, and other costs, used for budgeting and performance evaluation.
Raw Material
The basic material from which a product is made, typically unprocessed or minimally processed before being used in manufacturing processes.
Fixed Overhead
Costs that do not vary with the level of production or sales, including rent, salaries, and insurance, ensuring the basic operational capability of a business.
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