Perform the indicated operations and simplify the expression. 
Definitions:
Sodium
A chemical element, symbol Na, a highly reactive metal and an essential nutrient for human health.
Calories
A measure of energy in food, technically defined as the amount of heat needed to raise the temperature of one kilogram of water by one degree Celsius.
Scatter Diagram
A graphical representation of data points for two variables in a dataset, used to investigate the possible relationship between them.
Interval Data
A type of numerical data that represents quantities and for which intervals between values are meaningful, allowing for a range of mathematical operations.
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