The meaning of "M" depends on context, but commonly in finance and measurements:

• "M" as a Roman numeral represents one thousand. For example, $60,000 might be written as $60M to mean 60 thousand, although often "k" is also used for thousands. In finance, "MM" is often used to stand for one million (thousand times thousand).

• In pricing or quantity contexts, $/M often means cost per thousand units, especially in industries like printing, media, or packaging. For example, $352.51/M means $352.51 per thousand items.

• In length measurement, "m" stands for meter, which equals 100 centimeters or 1000 millimeters.

If the question relates specifically to "how much is the M," it likely depends if it's a monetary unit shorthand or a length unit. "M" in monetary terms often represents thousand or million depending on usage, and in length, "m" is one meter. Please specify the context if a more precise explanation is needed.