Answer:
The bill Excluding tax was $41.64
Step-by-step explanation:
Price of food ordered by Mr.Buns = $7.75
Price of food ordered by Mrs. Buns = $9.50
Price of food for each kid = $3.49
Price of meal for 4 kids = 
Total cost for family = 7.75+9.50+3.49+13.96 =$34.7
They left a 20% tip.
So, Amount of tip =
So, Total cost including tip = 6.94+34.7 =41.64
Hence the bill Excluding tax was $41.64