I believe the shirts are different (in color, in size, in style,...), is so then:
¹⁰C₆ = (10! )/( 6! )( 10-6) ! = 210 COMBBINATIONS
I say left because you have a straight line, i goes through 0,0 and every time it goes over 1 and up by 3.
21 is the opposite of -21
The town receives 5 inches of rain per week so multiply 5 by the number of weeks in a 31 day month
