This is a product placeholder for website development. I cut out an example that measures .985"/25mm dia and .130"/3.3mm thick. In O scale this would be a gear 47.3" dia and 6.24" thick. In HO 95.7" dia and 11.31" thick.
 
From trotec we have an example breakdown - "Laser cost" is typically caluculated at $1 per minute of laser use in the laser processing industry. Therefore, it is easy to determine costs based on various graphics and processing time. In the ballpoint pen example, if your engraving takes 15 seconds, the laser costs will equal to 25 cents per unit.
 
In the example for a pen, the cost of the pen is $1.50. It takes 15 seconds to engrave the pen for a $0.25 engraving cost. Labor cost at $40/hour so labor is $0.11 - so total costs would be $1.86 with retail price is $15 which gives a profit of $13.14 per pen. That means they had a markup of 8.06 x total cost.
 
Using that as a guide then, the gear takes 2.26 min to engrave/cut or $2.26 - Ignoring the cost of the 1/8" Birch Plywood I used for the test cut that would be $2.26 x 8.06 .. or $18.22 .. obviously silly .. but worth looking at what the gear would cost given the above calculations.