Problem $3-1($Algo$)$

A commercial bakery has recorded sales $($in dozens$)$ for three products, as shown below:

Day Blueberry Muffins Cinnamon Buns Cupcakes

$1311545$

$2311412$

$3331616$

$4311648$

$5392221$

$6302316$

$7322312$

$8362248$

$9292417$

$10322419$

$11382510$

$12312750$

$13353018$

$14333115$

$15343313$

Click here for the Excel Data File

a$.$ Predict orders for the following day for each of the products using an appropriate naive method.

b$.$ What should the use of sales data instead of demand imply?