Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1847 , Strauss , his mother and two sisters moved to New York City to join his brothers Jonas and Louis LÃ b in their dry goods business .
Simplified: At the age of 18 , Strauss , his mother and two sisters sailed for the United States to join his brothers Jonas and Louis , who had begun a wholesale dry goods business in New York City called J. Strauss Brother & Co.