Use Conditional Formatting to highlight cells in the "ROI" column. If an upgrade pays for itself in under 10 minutes, highlight it Green . If it takes 2 hours, highlight it Yellow . This tells you instantly where to spend your credits.
Smelting and crafting are the backbones of late-game progression. The helps you determine the most profitable items to produce.
Below is a draft essay exploring the significance of these spreadsheets, their role in the "meta" of the game, and why they are essential for high-level progression. The Architect’s Galaxy: The Role of Spreadsheets in Idle Planet Miner In the landscape of incremental gaming, Idle Planet Miner
This is the most important feature for early-to-mid game players.