In Planning a Sidewalk Cafe, It Is Estimated That If $\frac { 1 } { 4 }$

Multiple Choice

In planning a sidewalk cafe, it is estimated that if there are 28 tables, the daily profit will be $8 per table and that, if the number of tables is increased by x, the profit per table will be reduced by $\frac { 1 } { 4 }$ x dollars (due to overcrowding) . How many tables should be present in order to maximize the profit?

A) 20
B) 30
C) 10
D) can't do the problem without cost information