Just like you can buy the call, you can sell the call.
There is a bid price (the price you can sell it for) and there is an ask price (the price you can buy it for).
You are looking at a weekly option, and they go down in value very quickly, so be careful.
when you buy a call you can sell that call anytime prior to expiration...the underlying price doesn't necessarily dictate where you sell your call. Obviously if you are far out of the money your call will be worthless but if you have some time premium on it you can certainly sell.