People usually call with a version of the same question: what is my case worth. It is a fair question and it deserves a truthful answer, which is that nobody can responsibly tell you a number early on. What can be explained, and what actually helps, is the structure. A claim is assembled from defined categories of loss, and each one is proved with different evidence.
Those categories divide roughly in two. Economic damages are the losses with a paper trail: medical bills, wages, replacement services, property. Non economic damages cover pain, suffering, disfigurement and the parts of life an injury takes away, and California sets no formula for them. In a narrow set of cases punitive damages may also be available, but only on clear and convincing proof of malice, oppression or fraud.
What moves a claim is not a demand letter but the completeness of the record behind it. Treatment that is documented and consistent, an accurate earnings picture, a physician’s opinion about what comes next, and in product cases an engineering analysis of why the item failed. Insurers price a claim by how well it would present to a jury, so building it properly is the same work as valuing it properly.