The spreadsheet is
here. (<<link). The spreadsheet contains no macros, just cell formulas. (It's safe.). Before diving into the spreadsheet, spend some time with the README.pdf. It shows the three ways you'll interact with the spreadsheet (1. add a product; 2. resolve a multi-bottle "lineup" to see what NPK ratio/strength the different bottles create, and 3. create a NPK ratio/strength using other stuff, like this guano product you're looking at.).
Once you understand how to do those three things, it will be a very handy tool. (If you dive straight into the spreadsheet, you probably won't know what to do. The key is the readme file.).
There is a "products" subdirectory which contains various products I've already added. You can download those spreadsheets and copy a product into the "mixer" spreadsheet. (Just right-click on a product's tab at the bottom, and move/copy to the Mixer spreadsheet, which should be open at the time you do this.). The "other products" spreadsheet has some generic things like epsom salt, gypsum, potassium sulfate.
You can unpack some multi-bottle "lineups" and see what NPK ratios they create. I've done that with some
GH Flora Series (3-part) and Fox Farms "trio". If you go back one directory, you'll see those in the "feeding schedules" directory. Also my feeding schedule using things like that guano product you're looking at. My schedule would give you some ideas how to put things like this together with other things. You just want a reasonable ratio and strength.
As an example of the ratios you want, 1-1-2 to 3-1-2 in veg. In flower: 1-1-2 to 1-3-2. But, I wouldn't hit that higher P proportion until late flower, more like "booster" ratio. The proportion of K could be higher throughout. If you see my feeding schedule, I do around 2-1-1.8 in veg, and 1-1.5-1.8 in flower. If you unpack some "multi-bottle" schedules, you'll see they do something similar, or more pronounced N & K in veg, and P & K in flower.
If you add any multi-bottle products, and unpack their schedule to see their resulting NPK ratio/strength, you can give me that info and I can add it to what I have.