EPA 5 Piece Correction Script

Does anyone have or know of someone using an R script to automatically apply the EPA correction equation to PurpleAir data? We are looking for one that does all 5 equations (the version currently on the fire and smoke map) - so if a concentration is between 0-30, it will use one formula, 30-50, a different one, etc… anyone using this currently?

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I too would love this, maybe even as an excel macro book!?