The Court ordered the defendant to pay two-thirds of the plaintiffs' costs where the plaintiffs succeeded on one discrete claim ($750,000) but failed on another ($850,000) and on an estoppel argument, with all issues arising from a common factual matrix. A Calderbank offer was held to provide no basis for depriving the plaintiffs of costs because it failed to account for substantial accrued interest (over $90,000), meaning the plaintiffs' actual entitlement exceeded the offer amount even after their partial failure. The reduction to two-thirds also reflected the abandonment of the defendant's cross-claim, for which the plaintiffs were entitled to recover preparation costs.
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