Study the given table and answer the question that follows.

Production of masks (in million) by a company during the first half of 2020

Type/Month	April	May	June	July	August	September
Surgical	250	250	180	400	200	150
N 95	250	270	500	450	300	200
FFP1	250	270	150	250	300	200
Activated Carbon	250	260	250	330	300	350
Clothes & sponge	250	260	260	350	320	240
Total	1250	1310	1340	1750	1420	1140

In the case of Activated Carbon Masks, in which pair of months was the production equal?