DSCAのは元来が議会への通告で契約ではない
数もup toだから議会向けに最大数を出しただけ

WASHINGTON, October 29, 2019 - The State Department has made a determination approving a possible Foreign Military Sale to Japan for the upgrade of up to ninety-eight (98) F-15J aircraft to a Japanese Super Interceptor (JSI) configuration for an estimated cost of $4.5 billion.