Song: "Summer Nights"
Artist: Grease
Peak position on the Cashbox Singles chart: #3
Number of weeks on the Cashbox Singles chart: 15
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| August 5, 1978 | 51 | Summer Nights | Grease | RSO 906 |
| August 12, 1978 | 37 | Summer Nights | Grease | RSO 906 |
| August 19, 1978 | 26 | Summer Nights | Grease | RSO 906 |
| August 26, 1978 | 18 | Summer Nights | Grease | RSO 906 |
| September 2, 1978 | 13 | Summer Nights | Grease | RSO 906 |
| September 9, 1978 | 9 | Summer Nights | Grease | RSO 906 |
| September 16, 1978 | 8 | Summer Nights | Grease | RSO 906 |
| September 23, 1978 | 5 | Summer Nights | Grease | RSO 906 |
| September 30, 1978 | 3 | Summer Nights | Grease | RSO 906 |
| October 7, 1978 | 3 | Summer Nights | Grease | RSO 906 |
| October 14, 1978 | 8 | Summer Nights | Grease | RSO 906 |
| October 21, 1978 | 25 | Summer Nights | Grease | RSO 906 |
| October 28, 1978 | 43 | Summer Nights | Grease | RSO 906 |
| November 4, 1978 | 71 | Summer Nights | Grease | RSO 906 |
| November 11, 1978 | 99 | Summer Nights | Grease | RSO 906 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.