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The unit-costing method that merges prior-period work and costs with current-period work and costs is called: Oa. Operating costing Ob. Weighted average method Oc. FIFO costing method Od. Transferred-in cost ? Long Distance Company's travel department had the following budgeted costs for the coming year: Variable costs Fixed costs $34 per trip $143,360 Monthly Peak Trips 5 Yearly Trips 110 trips 170 trips 150 trips 130 trips West Sales Territory Midwest Sales Territory Southern Sales Territory Eastern Sales Territory 12 15 8