Since there are 12 face cards (4 J, 4 Q, 4K) those represent 12/52. The nonface cards excluding aces (4 twos through 4 tens) represent 36/52.
The expected value is then:
(12/52)($3)+(36/52)(-$2)= -$36/52 or -$0.69 but rounding to one decimal would be -$0.70