Moved redundant lines from bulk_on_sale and bulk_off_sale to get_targets
Moved redundant lines from previous_changes to mail_subscription_status
Moved redundant lines to raise_amount_error and cleaned up conditionals in validate_amounts. Corrected misspelled 'donantion'. Removed extra space from row_valid?
Moved exclusive? from regular_donation_kit & sponsored_donation_kit to kit