/**
 * @description Adds two numbers (`valueA` and `valueB`) with optional precision adjustment.
 * Handles edge cases where inputs are not valid numbers by normalizing the values or returning defaults.
 *
 * @param valueA The first value to add. Can be a number or a value convertible to a number.
 * @param valueB The second value to add. Can be a number or a value convertible to a number.
 * @param precision The number of decimal places to apply to the result. Defaults to 5.
 *
 * @returns The result of the addition, normalized and adjusted to the specified precision.
 * Returns `0` if both inputs are `NaN`. If one of the inputs is invalid, the valid input is returned.
 *
 * @example
 * ```typescript
 * Sum(10, 5); // Returns 15
 * Sum(10, "3.5", 2); // Returns 13.50
 * Sum(NaN, 5); // Returns 5
 * Sum(10, NaN); // Returns 10
 * Sum(NaN, NaN); // Returns 0
 * ```
 */
export declare const Sum: (valueA: number, valueB: number, precision?: number) => number;
export default Sum;
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