Which three OmniScript elements would be essential for creating a new quote estimation process involving variable rows of data?

In the context of creating a new quote estimation process involving variable rows of data, utilizing an Edit Block is crucial. An Edit Block serves as a container for input fields where users can enter or modify data. It allows for the dynamic display of fields based on user interaction and can accommodate multiple rows of data, which is essential for varying quotes. This flexibility enables users to enter specific details related to each item in the quote, such as descriptions, quantities, or prices.

The other elements—Multi-select, Formula, and Step—while they can play supportive roles in certain scenarios, do not inherently provide the necessary functionality to capture and manage the detailed input related to a quote's components or variable rows. Multi-select focuses on allowing users to select multiple options from a list, which may not be directly aligned with inputting detailed data for variable rows. Formula elements can perform calculations but do not facilitate data entry. Steps are useful for guiding users through a process but do not directly handle data input related to variable rows.

In sum, the Edit Block is key in this scenario as it directly supports the requirements to gather and manage variable input data critical to the quote estimation process.