Answering this issue just demands some easy algebra. If we think the cost of celery = x, then the price of onions = 2x, and cost with the carrots is 4x, such that the entire price of all greens = x + 2x + 4x = 7x = 21 https://cruzqkyak.thezenweb.com/the-single-best-strategy-to-use-for-help-with-case-study-78618082