Expected value of multiple events

There are three offers

Offer A - $5 probability of redemption A - P (A) = 0.5 Offer B -$ 4 Probability of redemption B – P(B) = 0.6

Offer C - $3 probability of redemption C – P(C) = 0.7 If I send only offer A, Expected Value is 0.5 * 5 =$2.5

If I send only offer B, Expected Value is 0.6 * 4 = $2.4 If I send only offer C, Expected Value is 0.7*3 =$2.1

Expected value of sending All three ?? is it E(A)+E(B)+E(C) = 7 ? Am I doing something wrong here.

What will be the overall expected value if I send all three offers. The customers can redeem any combinations of offers ie only A, only B ,only C, Both AB, both BC, both CA, ABC and none