The five month moving averages for the following data

is:

109, 112.2, 117, 120.6, 126

The correct answer is Option (1) → 109, 112.2, 117, 120.6, 126

Formula: Five-month moving average = $\frac{\text{Sum of 5 consecutive months}}{5}$

Month 43-47: $\frac{105+106+110+110+114}{5} = \frac{545}{5} = 109$

Month 44-48: $\frac{106+110+110+114+121}{5} = \frac{561}{5} = 112.2$

Month 45-49: $\frac{110+110+114+121+130}{5} = \frac{585}{5} = 117$

Month 46-50: $\frac{110+114+121+130+128}{5} = \frac{603}{5} = 120.6$

Month 47-51: $\frac{114+121+130+128+137}{5} = \frac{630}{5} = 126$