Thoroughly Modern Magic updates Classic: Technomancer's Industrial Enchantment to 4e.
Comment[]
This is where show your work would help immensely as it is clear where the $2,665.60 is coming from (mages x Expenses Per Hex) but less so where the manufacturing cost of $2,883 is coming from as you have to look up the cost of the magic item.
References[]
- Pyramid 3/66: The Laws of Magic pg. 25-28