Most likely Yes. The person being robbed doesn't know it's a BB gun. This is a legal question and should be answered by local law enforcement.
2400 x .249 % is 597.6.
2399.80
2399.80
2700-2400/2400= 300/2400=.125 12.5%
2400
2400
2400
40% of 2400= 40% * 2400= 0.4 * 2400= 960
2400
2400
2400
5 x 2400 = 12000 5% of 2400 = 120