Pentagon overestimated value of weapons it has sent to Ukraine by $6.2 billion over the past two years, about double early estimates resulting in a surplus that will be used for future security packages. Pentagon spokeswoman Sabrina Sigg: The military services used replacement costs rather than the book value of equipment pulled from Pentagon stocks and sent to Ukraine. She said final calculations show that there was an error of $3.6 billion in the current fiscal year and $2.6billion in the 2022 fiscal year.