Sally Has Three Pieces Of Material. The First Piece Is 1 Yd. 2 Ft. 6 In. Long, The Second Piece Is 2 Yd. 1 Ft. 5 In Long, And The Third Piece Is 4 Yd. 2ft. 8in Long. How Much Material Does Sally Have?

The total length of Sally's material is
  (1 yd 2 ft 6 in) + (2 yd 1 ft 5 in) + (4 yd 2 ft 8 in)
  = (1+2+4) yd + (2 + 1 + 2) ft + (6 + 5 + 8 in)    (add each of the units separately)
  = 7 yd 5 ft 19 in    (find the total)
  = 7 yd 6 ft 7 in    (convert 19 in to 1 ft 7 in)
  = 9 yd 7 in    (convert 6 ft to 2 yd)