To find out how many sundaes were sold each day, we first need to calculate the total number of sundaes sold during the 4-day promotion. We will sum the number of each type of sundae sold:
- Chocolate sundaes: 232
- Butterscotch sundaes: 181
- Strawberry sundaes: 68
- Black-and-white sundaes: 55
Adding these numbers together:
\[ 232 + 181 + 68 + 55 = 536 \]
Now that we know the total number of sundaes sold is 536, we can find out how many were sold each day by dividing the total by the number of days:
\[ \frac{536}{4} = 134 \]
Thus, the number of sundaes sold each day is 134 sundaes.