Office Depot offers the Sharp Scientific Calculator in Green, model no. EL-501XBGR, for $1.99. Opt for in-store pickup to avoid the $9.95 shipping charge. That's $5 below the lowest shipped price we could find and the least expensive Sharp scientific calculator we've ever seen. Sales tax is added where applicable. This calculator features an LCD display and 131 functions for general math, algebra, geometry, trigonometry, statistics, and more. Deal ends July 28.