5. (10%) A manager wants to test if different packaging (A, B, C, D) have an effect on coffee beans sale at supermarket. She randomly assigns each supermarket to one of the 4 packages and records packs of coffee beans sold in a one-week period.

| packaging | number of supermarkets | mean | variance |
| --- | --- | --- | --- |
| A | 9 | 48 | 23.50 |
| B | 9 | 50 | 39.00 |
| C | 8 | 56 | 20.86 |
| D | 8 | 59 | 44.57 |

The average coffee beans sold for all supermarkets in the week is 53 packs, and sum of square total (SST) is 1624.

(1) (5%) What is the sum of square between (among)?