Answer
$M2 = 2,880$ million dollars
Work Step by Step
M2 = M1 + savings deposits + small-denominated time deposits + retail MMMFs
We are given:
M1 = 2240
Savings deposits (including MMDAs) = 140
Small time deposits (<100k) = 100
MMMFs held by individuals = 400
We determine M2:
M2 = 2240 + 140 + 100 + 400 = 2880 million dollars
M2 = $2,880 million