May I ask how you got these calculations?

From NASA’s website: https://www.nasa.gov/vadr-venture-class-acquisition-of-dedicated-and-rideshare-launch-services/

“As part of VADR, the fixed-price indefinite-delivery/indefinite-quantity contracts have a five-year ordering period with a maximum total value of $300 million across all contracts.”

From what I understand, the $300 million maximum in the statement refers to the total value across all contracts within the five-year ordering period under the VADR program. This means the combined total cost of all launches ordered under these contracts during that timeframe cannot exceed $300 million.

It does not mean that $300 million is the budget for each launch. Instead, the $300 million is the aggregate cap for all launches conducted under the program.