please help

Radovilsky Manufacturing Company, in Hayward, California, makes flashing lights for-toys. The company operates its production facility 300 days per year. It has orders for about 12,300 flashing lights per year and has the capability of producing 105 per day. Setting up the light production costs $51. The cost of each light is $1.00. The holding cost is $0.05 per light per year. a) What is the optimal size of the production run? units (round your response to the nearest whole number)