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An order or BPA with an estimated value exceeding the simplified acquisition threshold. Orders exceeding the micro-purchase threshold but not exceeding the simplified acquisition threshold. Single-award BPA. If the ordering activity establishes a single-award BPA, authorized customers may perhaps location the order directly beneath the established BPA when the will need for the provide or service arises. Join Macmillan Dictionary on Twitter and Facebook for each day word information, quizzes and language news. If you had a balloon full of helium, and attempted to weigh it on a scale, it would float away. Energy release, mass, and mass change of...