In the first week, the man sells 100 loaves of bread.
In the next week, he sells twice as many loaves, which would be 2 × 100 = 200 loaves of bread.
To determine the total number of loaves he sold, we add the number of loaves sold each week:
100 loaves + 200 loaves = 300 loaves.
Therefore, the man sold a total of 300 loaves of bread.