Respuesta :
					                   Find the "unit cost."  Divide the total price paid by the number of units sold:
$p
------------ = $(p/8) / lamp
8 lamps
The unit cost is p/8 dollars per lamp.
					                
					             $p
------------ = $(p/8) / lamp
8 lamps
The unit cost is p/8 dollars per lamp.
 
					                  