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.
The cost basis methods approved by the IRS include: 1  Average Cost. Using the average cost, cost basis is calculated based on the average price paid for all shares held, regardless of holding period. 2  First In, First Out (FIFO) Using FIFO, cost basis is calculated using the specific amount paid for shares. 3  Specific Shares.