Air conditioning sales evolution epp b2 p87

1. Air conditioning sales evolution (graph p87)
Sales decreased slightly in winter, then slumped to
a low point in mid-April, only to recover steadily
over the months of May and June.
As is to be expected, sales then sky-rocketed and
reached a peak of 5500 units in August only to
plummet to 1800 devices in September.
The demand levelled off at the beginning of
October to reach a two-month plateau over the fall.
Sales reached an all-time low in November
although, quite surprisingly, they recovered
significantly in December.
Overall last year saw quite a number of fluctuations.
Cause:
To cause something
Interesting synonyms (transitive verbs):
To trigger
To provoke
To prompt