The phrase "get a total for" is commonly used to refer to the process of determining the sum or overall amount of something. However, there are many synonyms that can be used instead of this phrase to convey the same meaning. For example, instead of saying "get a total for" you could say "calculate the total," "determine the sum," "compute the amount," "tally up the figures," or "add up the numbers." Other phrases that could be used include "find the grand total," "evaluate the aggregate," or simply "total up." By using these synonyms, you can add variety and richness to your language while expressing the same concept.