There are different items you can create in the game through Engineering. You must have the schematic/recipe first and most will come as you do quests. The easiest item to make is a Bandage. You will get this early on in the game. You only need 2 items (Antiseptic Forumula and Cloth Rags). They are inexpensive.
Example: Buy 50 Cloth Rags and 50 Antiseptic Formula. This will cost you a total of $600 with discount, more if not. Go into Engineering in the menu and make the bandages. The achievement unlocks after exiting the screen.