Write SQL query to solve given problem: How many of the "Hon Pagoda Stacking Chairs" have been sold in total in the west superstore?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(T1.Quantity) FROM west_superstore AS T1 INNER JOIN product AS T2 ON T1.`Product ID` = T2.`Product ID` WHERE T2.`Product Name` = 'Hon Pagoda Stacking Chairs'