f = 2800 *( 1+(0.05-0.0 15)* 2/ 12)= 28 16.33

If calculated according to compound interest

F = S * exp ((r - q)t)

f = 2800 * exp((0.05-0.0 15)* 2/ 12)= 28 16.38

Two is two months, and t is the year.

As a result, press the calculator yourself.

In practice, the dividend time is uncertain and uneven, so it needs to be converted into integral according to the actual dividend date and then the theoretical price is calculated.