I got some new bench top matting (see Buy/Sell/Wanted) and Dave just did a video on his new mat and his rejuvenated bench and I thought we really need a metric besides the size of the bench.
I propose a new metric. The MIPSM, pronounced mip rhymes with pip and sm like sim, mipsim. The MIPSM is the Monthly Income Per Square Meter*. To calculate the MIPSM for your bench :
(Income per month)/(bench top area in m2)
$3000/1.39m2
2158MIPSM
My bench operates at 0 MIPSM but can only go up from here (I believe).
No need to get complicated about how much the equipment cost that adorns the bench or shelving, etc.
*for sq. ft. multiply sq. ft. by 0.09290304 to get sq. meters.