Which of the following is true?

		The weighted average process costing method calculates unit costs using the costs and output of only the current period.
		The weighted average process costing method calculates unit costs using the costs and output of only the prior period.
		The FIFO process costing method calculates unit costs using the costs and output of both the current and prior period.
		The weighted average process costing method calculates unit costs using the costs and output of both the current and prior period.