May be associated with the presence of sodium in drinking water when present in high concentrations. Often from saltwater intrusion, mineral dissolution, industrial and domestic waste. Deteriorates plumbing, water heaters, and municipal water-works equipment at high levels.
Cost basis is the original price paid for shares of a security plus or minus certain adjustments required by applicable tax rules such as adjustments with respect to reinvested distributions and sales charges.
Cost basis is the price you paid to purchase a security plus any additional costs such as broker's fees or commissions. When you sell a security, your tax liability is determined by how much you spent to buy the security (cost basis) and your sales price. If you sell a security for more than the original purchase price, the difference is taxable as a capital gain.