Final answer:
The eval command allows you to calculate and manipulate field values in your report.
Step-by-step explanation:
The command that allows you to calculate and manipulate field values in your report is the eval command. This command is commonly used in programming and data analysis to perform calculations or manipulate values in fields or variables.
For example, if you have a report with a field named price and you want to calculate the total cost of all items, you can use the eval command to multiply the price field by the quantity field and store the result in a new field.
Using the eval command is a powerful way to perform calculations and manipulations on field values, making it a useful tool in various fields such as data analysis, statistics, and programming.