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Use "underbilling" in a sentence
"Thrift immediately ordered new caps with neutral gray underbilling for his Academy players."
"New automated meters caused overbilling and underbilling errors for 3,400 Virginia Natural Gas customers."
"The only way that Overstock. com could recognize income from underbilling its fulfillment partners in future accounting periods is if there was a "significant uncertainty as to collection" of all underbilled amounts (See SFAS No. 5 paragraph 23)"