Type of retailers in the final sample
| Retailer type | N |
| Chain grocery store | 2 |
| Independent grocery store | 2 |
| Chain gas station (all but one with an attached convenience store) | 3 |
| Independent gas station (with an attached convenience store) | 3 |
| Chain convenience store | 1 |
| Chain pharmacy | 2 |
| Independent pharmacy | 1 |
| Liquor store | 4 |
| News stand | 2 |
| Gift shop | 2 |
| Total | 22 |