Answer:
33
Explanation:
19+1 additional for each guest so there are 13 guests so 13+1= 14 so 14+19= 33
hope this helps or maybe it could be that you have to times it so here it is.
13 times 1 = 13 so we still have 19 so 19+13= 32 but i think it is 33 trust me. :) tell me if this was right thx.