## Step 1: Define the optimization problem
The problem is to maximize the objective function: $6.18 \times \text{cherry pies} + 1.21 \times \text{tomatoes} + 2.81 \times \text{ravioli} + 6.74 \times \text{rotisserie chickens}$.

## Step 2: List all the constraints
1. $\text{cherry pies} \times 5 + \text{tomatoes} \times 2 + \text{ravioli} \times 8 + \text{rotisserie chickens} \times 2 \leq 82$
2. $\text{cherry pies} \times 8 + \text{tomatoes} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \leq 60$
3. $\text{tomatoes} \times 2 \geq 7$
4. $\text{cherry pies} \times 5 + \text{rotisserie chickens} \times 2 \geq 10$
5. $\text{cherry pies} \times 5 + \text{ravioli} \times 8 \geq 18$
6. $\text{cherry pies} \times 5 + \text{tomatoes} \times 2 \geq 6$
7. $\text{cherry pies} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \geq 10$
8. $\text{cherry pies} \times 8 + \text{tomatoes} \times 8 + \text{rotisserie chickens} \times 2 \geq 10$
9. $\text{tomatoes} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \geq 10$
10. $\text{cherry pies} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \geq 15$
11. $\text{cherry pies} \times 8 + \text{tomatoes} \times 8 + \text{rotisserie chickens} \times 2 \geq 15$
12. $\text{tomatoes} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \geq 15$
13. $\text{cherry pies} \times 5 + \text{tomatoes} \times 2 \leq 27$
14. $\text{cherry pies} \times 5 + \text{rotisserie chickens} \times 2 \leq 51$
15. $\text{cherry pies} \times 5 + \text{ravioli} \times 8 \leq 42$
16. $\text{cherry pies} \times 5 + \text{tomatoes} \times 2 + \text{ravioli} \times 8 + \text{rotisserie chickens} \times 2 \leq 42$
17. $\text{cherry pies} \times 8 + \text{ravioli} \times 2 \leq 34$
18. $\text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \leq 56$
19. $\text{cherry pies} \times 8 + \text{tomatoes} \times 8 + \text{ravioli} \times 2 + \text{rotisserie chickens} \times 2 \leq 56$

## Step 3: Implement the optimization problem using Gurobi
```python
import gurobi

# Create a new Gurobi model
m = gurobi.Model()

# Define the variables
cherry_pies = m.addVar(name="cherry_pies", lb=0)
tomatoes = m.addVar(name="tomatoes", lb=0)
ravioli = m.addVar(name="ravioli", lb=0)
rotisserie_chickens = m.addVar(name="rotisserie_chickens", lb=0)

# Define the objective function
m.setObjective(6.18 * cherry_pies + 1.21 * tomatoes + 2.81 * ravioli + 6.74 * rotisserie_chickens, gurobi.GRB.MAXIMIZE)

# Define the constraints
m.addConstr(5 * cherry_pies + 2 * tomatoes + 8 * ravioli + 2 * rotisserie_chickens <= 82, name="cost_constraint")
m.addConstr(8 * cherry_pies + 8 * tomatoes + 2 * ravioli + 2 * rotisserie_chickens <= 60, name="carbohydrates_constraint")

m.addConstr(2 * tomatoes >= 7, name="tomatoes_cost_constraint")
m.addConstr(5 * cherry_pies + 2 * rotisserie_chickens >= 10, name="cherry_pies_rotisserie_chickens_cost_constraint")
m.addConstr(5 * cherry_pies + 8 * ravioli >= 18, name="cherry_pies_ravioli_cost_constraint")
m.addConstr(5 * cherry_pies + 2 * tomatoes >= 6, name="cherry_pies_tomatoes_cost_constraint")

m.addConstr(8 * cherry_pies + 2 * ravioli + 2 * rotisserie_chickens >= 10, name="carbohydrates_constraint_1")
m.addConstr(8 * cherry_pies + 8 * tomatoes + 2 * rotisserie_chickens >= 10, name="carbohydrates_constraint_2")
m.addConstr(8 * tomatoes + 2 * ravioli + 2 * rotisserie_chickens >= 10, name="carbohydrates_constraint_3")

m.addConstr(8 * cherry_pies + 2 * ravioli + 2 * rotisserie_chickens >= 15, name="carbohydrates_constraint_4")
m.addConstr(8 * cherry_pies + 8 * tomatoes + 2 * rotisserie_chickens >= 15, name="carbohydrates_constraint_5")
m.addConstr(8 * tomatoes + 2 * ravioli + 2 * rotisserie_chickens >= 15, name="carbohydrates_constraint_6")

m.addConstr(5 * cherry_pies + 2 * tomatoes <= 27, name="cherry_pies_tomatoes_cost_constraint_2")
m.addConstr(5 * cherry_pies + 2 * rotisserie_chickens <= 51, name="cherry_pies_rotisserie_chickens_cost_constraint_2")
m.addConstr(5 * cherry_pies + 8 * ravioli <= 42, name="cherry_pies_ravioli_cost_constraint_2")
m.addConstr(5 * cherry_pies + 2 * tomatoes + 8 * ravioli + 2 * rotisserie_chickens <= 42, name="total_cost_constraint")

m.addConstr(8 * cherry_pies + 2 * ravioli <= 34, name="carbohydrates_constraint_7")
m.addConstr(2 * ravioli + 2 * rotisserie_chickens <= 56, name="carbohydrates_constraint_8")
m.addConstr(8 * cherry_pies + 8 * tomatoes + 2 * ravioli + 2 * rotisserie_chickens <= 56, name="carbohydrates_constraint_9")

# Solve the model
m.optimize()

# Print the solution
if m.status == gurobi.GRB.OPTIMAL:
    print("Objective: ", m.objVal)
    print("Cherry pies: ", cherry_pies.varValue)
    print("Tomatoes: ", tomatoes.varValue)
    print("Ravioli: ", ravioli.varValue)
    print("Rotisserie chickens: ", rotisserie_chickens.varValue)
else:
    print("The model is infeasible")
```