There are about 150 cups (8oz.) of grain in a 60 pound bushel of wheat (1 bushel = 0.352 hectolitres in volume, 1 hectolitre = 3381.4 US fluid oz.).
When converted to flour these 150 cups of kernels produce about 300 cups of flour.
About 3 cups of flour are required to produce a single 1.5 pound loaf of bread.
Therefore 1 bushel of flour produces about 100 loaves of bread each weighing 1.5 pounds (24 oz.)
Or, in other words, a bushel of grain berries (kernels) produces about 150 pounds of bread.
It isn't possible to tell. Each bushel of wheat makes a somewhat different amount of wheat. Also, each type of bread uses a somewhat different amount of flour. So between those two variables you can't predict how many loaves will be made.