**Permitive Cells for the Given Unit Sales of Square Lettuce**

To determine the permitive cells for the given unit sales of square lettuce, we first need to understand the concept of permitive cells and how they relate to this specific scenario. Permitive cells, also known as unit cells or primitive cells, are the smallest repeating units within a crystal lattice that can be used to construct the entire lattice structure.

In the context of the given unit sales of square lettuce, we can consider the lettuce as a two-dimensional structure. Therefore, we are looking for the smallest repeating units that make up this two-dimensional lettuce structure.

**1. Basic Unit Cell:**
The basic unit cell is the simplest repeating unit that can be used to construct the entire two-dimensional lettuce structure. In this case, the basic unit cell can be visualized as a square representing a single lettuce leaf.

**2. Combination of Unit Cells:**
By combining multiple basic unit cells, we can create different patterns and arrangements of lettuce leaves. These combinations can be represented by various permitive cells within the lettuce structure. Some possible permitive cells include:

- **Square Grid Arrangement**: In this arrangement, the basic unit cells are arranged in a regular square grid pattern, with each square representing a lettuce leaf. The square grid arrangement is the simplest permitive cell and forms the foundation of the lettuce structure.

- **Hexagonal Grid Arrangement**: Another possible permitive cell for the lettuce structure is a hexagonal grid arrangement. In this arrangement, the basic unit cells are arranged in a hexagonal pattern, with each hexagon representing a lettuce leaf. This arrangement may be used in certain lettuce varieties that exhibit hexagonal packing.

- **Rectangular Grid Arrangement**: The lettuce structure can also be constructed using a rectangular grid arrangement, where the basic unit cells are arranged in a rectangular pattern. This arrangement might be observed in lettuce varieties that exhibit rectangular packing.

- **Triangular Grid Arrangement**: Additionally, a triangular grid arrangement can be a permitive cell for the lettuce structure. In this arrangement, the basic unit cells are arranged in a triangular pattern, with each triangle representing a lettuce leaf. This arrangement may be observed in certain lettuce varieties that exhibit triangular packing.

**Conclusion:**
In summary, the permitive cells for the given unit sales of square lettuce include the basic unit cell, as well as various combinations of unit cells such as the square grid arrangement, hexagonal grid arrangement, rectangular grid arrangement, and triangular grid arrangement. These permitive cells represent the smallest repeating units that make up the two-dimensional lettuce structure and can be used to construct the entire lattice.