Using the data below, determine the MAPE.

Period

Actual Demand

Forecast

Error

Absolute Value of Error

Absolute Percentage Error

$1$

$345$

$320$

$25$

$2$

$320$

$10$

$3$

$335$

$350$

$4$

$340$

$30$

$5$

$350$

$20$