xplain equivalent units. Why are$$ equivalent$-$unit calculations necessary in process$$ costing?

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Part $1$

Equivalent units is a derived number of

$$

$$

units that takes the quantity of each

$$

$$

input

output

in units completed or in incomplete units in work in$$ process, and converts the quantity of

$$

$$

input

output

into the number of completed

$$

$$

input

output

units that could be made with that quantity of

$$

$$

input

output

$.$

Part $2$

Equivalent unit measures are necessary since all physical units