Readonly unitThe unit the rate prices.
Readonly microMicro-dollars for per units: a whole number, zero or more.
Readonly perHow many units micro buys: a whole number, one or more.
Readonly evidenceThe measurement's artifact.
Readonly multiplierThe multiplier applied to the measured cost.
Readonly numerator: numberReadonly denominator: number
A rate derived from a measurement, with the evidence and the multiplier it was derived with.