buy +4 May 21, 2018 2755 calls at $0.05
sell -4 May 21, 2018 2735 calls at $2.00 (28 delta)
net credit (max profit): $1.95 x 4 x 100 = $780
expiration: 1 pm (PT)
Monday, 5/21/2018 (12:33 pm, PT)
buy back short calls (2735) at $0.10 to remove the risk
let long calls (2755) expire
PROFIT: $740 (in 3.5 hours) 😀