I don't understand the point of this spreadsheet, or at least the way it's done.
At least from an "ease of memorizing" perspective, this seems much simpler:
Base yields:
Grasslands: 2 food.
Plains: 1 food 1 production.
Coast: 1 food 1 commerce.
Tundra & Ocean: 1 food.
Snow and desert: nothing.
A hill
always adds +1 production.
A forest adds +1 production.
A rainforest, floodplain or marsh adds +1 food.
A reef adds +1 food and +1 production.
an example on mines:
MINE
A
mine adds +1 production (+2P with apprenticeship, +3P with industrialization).
In addition to above:
Production: Coal & Uranium add +2P.
Gold: Copper adds +2G, Silver/Diamonds add +3G
Science: Iron/Aluminium/Mercury add +1S
Culture: Amber & Jade add +1C
Special cases: Salt +1F +1G, Niter +1F +1P
Edit: all data taken from the spreadsheet, haven't played the game yet, thinking about buying it