Each drop-in guest is counted as half guest, therefore, 15 drop-in guests will be counted as 15/2 = 7.5 guests
Total guests including drop-in guests expected at Sydney and Nathan party will be
40 + 7.5 = 47.5 guests
from the table, 19 guests will order 28 pieces of fried chicken, 4 1/3 pounds of Deli meats and 10 3/4 pounds of Lasagna, , going by this proportion,
![\begin{gathered} 47.5\text{ guests will order : }(47.5)/(19)\text{ }*\text{ 28 = 70 pieces of fried Chicken} \\ \\ (47.5)/(19)*4(1)/(3)\text{ = 10}(5)/(6)\text{pounds of Deli Meats} \\ \\ \text{and } \\ (47.5)/(19)\text{ }*\text{ 10 }(3)/(4)\text{ = 26 }(7)/(8)\text{ pounds of Lasagna} \\ \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/gztn0jetzcovmzgjzdk3w5i4qxazt2scgl.png)