Many thanks to macnerd10, joemikeb and Tacit for their clear, concise explanations. If only economists could come up with accurate equations...


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365