Question Question about memory upgrade on an Asus laptop

Using this as a template;
https://www.shi.com/product/36004344/ASUS-ROG-Strix-GL703GE-ES73
your laptop can support a 2x16GB SO-DIMM DDR4-2400MHz dual channel ram kit. Question is, what do you tax your laptop with and how much is a kit mentioned above costing you, where you live?
Yeah, it looks like I can get the RAM from Amazon for maybe $50. But the CPU is 7 years old as is the GPU. For $50-60 though, maybe it gives me another year or two of use, and I can save for a new machine.