Uncle Ernie Snacks makes potato$$ chips, corn$$ chips, and cheese puffs using three different production lines within the same manufacturing plant.$$ Currently, Uncle Ernie uses a single plantwide overhead rate to allocate its $ $3$ comma $845$ comma $400$ of annual manufacturing overhead. Of this$$ amount, $ $1$ comma $785$ comma $000$ is associated with the potato chip$$ line, $ $1$ comma $310$ comma $400$ is associated with the corn chip$$ line, and $ $750$ comma $000$ is associated with the cheese puff line. Uncle Ernie$\text{'}$s plant is currently running a total of $17$ comma $400$ machine$$ hours: $10$ comma $500$ in the potato chip$$ line, $3$ comma $150$ in the corn chip$$ line, and $3$ comma $750$ in the cheese puff line. Uncle Ernie considers machine hours to be the cost driver of manufacturing overhead costs.$$

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Part $1$

$1.$ What is Uncle Ernie$\text{'}$s plantwide overhead$$ rate?

Determine the formula for calculating the plantwide overhead$$ rate, then calculate the rate.

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Plantwide overhead rate