You are given the following monthly demand data for Apple Airpods at Verizon.

Period Demand Forecast

$11,1831,237$

$21,4261,440$

$31,5591,580$

$41,4391,606$

$51,8241,869$

$61,8961,902$

$72,5962,216$

Compute the MAD for the given forecast for Periods $1-7.$

Rounding instructions

Carry calculations to three decimal places.

Enter your final answer rounded to one decimal place.