Thread:Cptnbob/@comment-82.45.106.176-20170820112912/@comment-26692787-20170820133740

You can only pre-deliver for Build contracts. At example: To build the Research Facility for Ling#8 you need 150M Gold, 225K Borax and 155K Wolfram. The previous contract demands only 100M Gold, so you can use the 70 electrics for #5 to deliver 50M Gold. For other examples see my answers to Bob's post.