Answer:
c. More than 545 but less than or equal to 600
Step-by-step explanation:
The computation is shown below:
Forecast for July is
= 0.4 × June + 0.3 × May + 0.2 × April + 0.1 × Mar
= 0.4 × 630 + 0.3 × 590 + 0.2 × 550 + 0.1 × 535
= 592.5
So, it is more than 545 but lower than or equal to 600
Therefore the option c is correct