Sammy's Sandwich Shop sells sandwiches for $9.50 each. It has monthly rental costs of $2,100 and employs 3 full-time staff for $1,500 in monthly salaries each. Other expenses average $300 per month.

On average, it costs $3.80 to make a sandwich. How many sandwiches does Sammy's need to sell each month in order to break-even?