the price of a book is $10. to buy the book, rosie must also pay 6% sales tax. rosie wants to know the total…

Brief Explanations:

To determine the quantity at the top of the table, we analyze the context. The table likely organizes components related to the price and tax. The "Price Before Tax" is the original price of the book ($10), which is the base amount before considering sales tax. The top of the table (with the % sign) is for the percentage related to the base. The "Price Before Tax" is the base quantity here, so it goes at the top (the box with $) or the structure: the top - most percentage - related part's base is the price before tax. Wait, no, the table has a % box and a $ box. The $ box is for the price before tax (since that's the amount the tax is applied to). Wait, the question is "Which quantity goes at the top of the table?" The options are Sales Tax, Price Before Tax, Total Price. The table's top - most (the first box with %) is related to the tax rate, but the $ box below? Wait, no, the table structure: the first row (top) has a % box, then a $ box. The $ box is for the price before tax (the original price, $10), which is the amount on which the tax is calculated. So the quantity for the $ box (or the main base) is Price Before Tax. So the answer is Price Before Tax.

Answer:

Price Before Tax