Programmable Graphing Calculator With A 10-Digit Lcd From Texas Instruments, Product Details Ideal for the algebra classroom. Lets students graph and compare functions, as well as perform data plotting and analysis. Horizontal and vertical split screen options. Advanced functions accessed through pull-down display menus. Includes tools for finance. I/O port for communication with other TI products. Sold as 1 Each. Ideal for the algebra classroom. Lets students graph and compare functions, as well as perform data plotting and analysis. Horizontal and vertical split screen options. Advanced functions accessed through pull-down display menus. Includes tools for finance. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.