Canon has user-replaceable printhead. Users can replace the printhead in about 10 minutes. Epson requires a technician to schedule an onsite visit and costs about $ 1,200. The Epson head is very durable - but won't last forever. Canon thermal head tends not to clog. Epson printer heads tends TO clog. Canon heads will self-clean if it does clog. Epson's heads do not. Canon's thermal technology (heat) tends to keep the nozzles cleaner than the piezo-electric design Epson uses.
Variable Cost per Unit. If the number of units produced in the period is 1,000 then the variable cost per unit is calculated as follows. Variable cost/unit = Variable cost / Number of units Variable cost/unit = 92,600 / 1,000 Variable cost/unit = 92.60.
1 Variable Cost is the cost which varies with the changes in the quantity of production units. 2  The Fixed cost is generally time related, i.e. it remains constant over a period of time. 3  Unlike Variable Cost which is volume related, i.e. it changes with the change in volume.