Susan will be managing the tuckshop at your school, so she decided to hand out questionnaires to the learners in order to do market research , draw up questionnaire susan can use in order to gather the information she requires which questionnaires are needed?​

answer; operating revenues;

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.

answer the amount a seller is paid minus the cost of production;