Returns the sum of two numbers. Equivalent to the `+` operator.
value1- The first addend.
value2- The second addend.
ADDonly supports the addition of two scalar values and takes neither ranges nor more than two arguments.
SUM: Returns the sum of a series of numbers and/or cells.
QUOTIENT: Returns one number divided by another, without the remainder.
PRODUCT: Returns the result of multiplying a series of numbers together.
MULTIPLY: Returns the product of two numbers. Equivalent to the `*` operator.
MINUS: Returns the difference of two numbers. Equivalent to the `-` operator.
DIVIDE: Returns one number divided by another. Equivalent to the `/` operator.