1 detail to give costs. Material. [Everythingyouoccupyeye,notallthefullmaterialischarged,forexampleyouapply2solderingandspendlittlepasteandtin,itchargesjustorhalfthevalue] Rent or own premises. [%Ofyourrentispaidfromthisrememberit] Based on the market and demand. [rareorcomplexpartstopurchase] [wholesaleorretailshipments] Costs for emergencies = Urgent clients are usually 35 to 50% more than the cost THE EFFORT I COST YOU [YOURKNOWLEDGEiswhatyoushouldvaluemost] = it involves time on the repair this is at your own discretion. Now if you want to compete, with other colleagues do it correctly with your prices. NO BECAUSE THERE IS A CHEAP MEAN WHAT IS QUALITY in every field is verb + talent effort = success in your business There are no fixed rates as parts increase or fall by USD or Yuan in parts.