| Detroit | Sfax | |
| One-way ticket (local transport) | USD 2.00 | USD 0.42 |
| Imported beer at restaurant | USD 3.50 | USD 1.28 |
| Chicken breasts at the market | USD 8.26 | USD 4.81 |
| Tennis court rent (1 hour on weekend) | USD 12.50 | USD 6.01 |
| Water bottle (1.5 liter) | USD 1.69 | USD 0.47 |