Just one of the engines costs almost as much as a Falcon Heavy launch. https://arstechnica.com/science/2020/05/nasa-will-pay-a-staggering-146-million-for-each-

Just one of the engines costs almost as much as a Falcon Heavy launch. https://arstechnica.com/science/2020/05/nasa-will-pay-a-staggering-146-million-for-each-sls-rocket-engine/ https://arstechnica.com/science/2020/05/nasa-will-pay-a-stag...