Here's a master list of Cloud custom report editing examples and other tips.
AssetCloud Report editing example: Add a grand total to the Asset by Location Report
https://support.waspbarcode.com/kb/articles/1361
AssetCloud Report editing example: Show the number of assets on the Assets by Location Report
https://support.waspbarcode.com/kb/articles/1500
AssetCloud & InventoryCloud: Custom Report FAQ (design, edit)
https://support.waspbarcode.com/kb/articles/1186
AssetCloud & InventoryCloud: How to add a sort to a report
https://support.waspbarcode.com/kb/articles/1356
AssetCloud & InventoryCloud: How to add a filter to a report
https://support.waspbarcode.com/kb/articles/1211
AssetCloud & InventoryCloud: How to add a page number to a report
https://support.waspbarcode.com/kb/articles/1431
Cloud reports: How to create a Relation
https://support.waspbarcode.com/kb/articles/1496
InventoryCloud report customization: Item Reorder by Site (instead of location)
https://support.waspbarcode.com/kb/articles/1752
InventoryCloud report customization: Pick Invoice, sort items by description
https://support.waspbarcode.com/kb/articles/1766
InventoryCloud report customization: Purchase Order Details Report - line totals, report grand total
https://support.waspbarcode.com/kb/articles/1767
InventoryCloud Report editing example: Add a grand total to the Inventory Cost Report
https://support.waspbarcode.com/kb/articles/1429