Boldfinch, Inc. plans to make patio chairs and sell them at $75 each. They estimate their fixed costs to produce the chairs at $300,000 and variable costs at $45 per chair.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.