Grand Total in report from query

LO Version: 6.2.5.2
Ubuntu 19.04

Attempting to calculate Ttl Product Price from the calculations in Query ofUnit Price*Qty

When I attempt to calculate the TTL PRDCT PRICE in the report, LO hangs after selecting Accumulate when attempting to Add Function.

Your help is appreciated.

HBS PRODUCTS.odb

anyone? anything?