DEPENDING ON THE SIZE AND TYPE OF ROCK, I CHARGE 10-12 DOLLARS A SQUARE FT., IF YOU DO A SINGLE FLOWERBED BORDER WITH LIMESTONE, I CHARGE 6.75 A LINEAR FT., THIS SHOULD COVER MORTAR, ROCK AND LABOR/..HEAVIER DRY STACKED RETAINING WALLS WITH A 5 x 8 STONE, I CHARGE 12-13$ A SQUARE FT. HOPE THIS...