Author name: David Gul

To charge sales tax on parts but not labor in Excel, mark every invoice line Taxable, Yes or No, and

To invoice materials and labor in Excel, put them on the same invoice as separate lines. Price each material from

To add a button that runs a macro in Excel, go to the Developer tab, click Insert, and choose the

To loop through rows in VBA without Excel freezing, read the whole range into an array first, do the work

Selecting a cell before working with it is the single biggest cause of slow VBA. Work with the Range object

To record a macro in Excel, enable the Developer tab, click Record Macro, perform the steps once, then click Stop

XLOOKUP searches any direction, has built-in error handling, and returns multiple columns. Complete guide with comparison table.

Use SUMIFS to total sales by region and month, count transactions by category, or build summary reports with multiple conditions.

Three methods to find matches, missing items, and duplicates between two Excel lists. COUNTIF, Conditional Formatting, and INDEX/MATCH approaches.

INDEX/MATCH can look up in any direction, handles multiple criteria, and won’t break when columns change. Step-by-step guide with comparison table.