Contribution from each Light.coms fluorescent tubes is $12.50. The tubes are sold over the internet to businesses and other organizations. How many bulbs must Light.com sell above their break-even point to earn a profit of $7,500,000 Select one: a. 7,500,000 b. 600,000 c. 1.000.000 d. 375.000 Contribution from each Light.coms fluorescent tubes is $12.50. The tubes are sold over the internet to businesses and other organizations. How many bulbs must Light.com sell above their break-even point to earn a profit of $7,500,000 Select one: a. 7,500,000 b. 600,000 c. 1.000.000 d. 375.000