The equation given is \( c = 11.65b \), where \( c \) denotes the total cost and \( b \) denotes the number of boxed lunches ordered.
To find the cost per boxed lunch, we can determine the cost for one boxed lunch by substituting \( b = 1 \) into the equation:
\[ c = 11.65 \times 1 = 11.65 \]
Thus, the cost per boxed lunch is \( 11.65 \) dollars.
This means the cost in dollars and cents per boxed lunch is $11.65.