Break even point = revenue profit - total costs
Let x be number of candy bars
0 = x - 0.25x + 29.95
-x + 0.25x = 29.95
0.75x = 29.95
0.75x/0.75 = 29.95/0.75
x = 39.933... = 40 (rounded)
The number of bars you must sell for your income to equal your costs at break even point is 40 bars.