Table 2.a. shows an LED light bulb manufacturer's total cost of producing LED light bulbs Table 2.a. Cases of LED light Total Cost bulbs produced in an hour 0 $4,500 10 $4,900 20 $5,100 30 $5,300 40 $5,400 50 $5,700 60 $6,700 70 $7,900 80 $9,700 90 $11,800 1. What is this manufacturer's fixed cost? Explain why