Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the number of electorates (2009) for the Indore district, when reserved for (SC / ST /None) is none, and constituency number is 208?

### Inputs:
table_name: table, columns: ['Constituency number', 'Name', 'Reserved for ( SC / ST /None)', 'District', 'Number of electorates (2009)']

### Response:
SELECT SUM Number of electorates (2009) FROM table WHERE District = indore AND Reserved for ( SC / ST /None) = none AND Constituency number = 208