Harlan Industries has a simple forecasting model: Take the actual demand for the same month last year and divide that by the number of fractional weeks in that month. This gives the average weekly demand for that month. This weekly average is used as the weekly forecast for the same month this year. This technique was used to forecast eight weeks for this year, which are shown in the following tables along with the actual demand that occurred.

Week	Forecast Demand	Actual Demand
1	140	137
2	140	133
3	130	144
4	137	154
5	132	174
6	142	164
7	165	178
8	142	198

Compute the MAD of forecast errors.

Note: Round your answers to 2 decimal places.

Week	MAD
1	a?
2	b?
3	c?
4	d?
5	e?
6	f?
7	g?
8	h?

a:

b:

c:

d:

e:

f:

g:

h: