the answer to your question is slate
that would be called plucking : )
''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."
she will be charged $6
48 dollars divided by 200 beads equals .24 dollars a bead
.24 multiplied by 25 more beads equals 6 dollars as the total cost