In the FLOWCHART, one LOOPS (repeating some command) UNTIL a "Yes"ANSWER allows STOPPING.

Below, we'll do that by STAGE, represent passage from one SUBSTAGE to another by an ARROW. And we'll do a simple probelm to avoid extra work.

How HOPPY PERFORMS 3 + 2 = 3:

         |        |          |        |
         |        |          |        |
         | * * *  |          |  *  *  |
         ----------          ----------

START Þ IS 2ND ADDEND BASKET EMPTY? Þ NO Þ TRANSFER 1 COUNTABLE FROM LESSER TO OTHER BASKET Þ

         |        |          |        |
         |        |          |        |
         |* * * * |          |   *    |
         ----------          ----------

IS LESSER BASKET EMPTY? Þ NO Þ TRANSFER 1 COUNTABLE FROM LESSER TO OTHER BASKET Þ

         |        |          |        |
         |        |          |        |
         |** * * *|          |        |
         ----------          ----------

IS LESSER BASKET EMPTY? -> YES -> STOP TRANSFERRING & COUNT COUNTABLES IN NONEMPTY BASKET -> 5 -> HAVE PRINTER PRINT TOTAL OF 5 AS SUM.

Please note this this STAGING of FLOWCHART PROCEEDS LIKE A REWRITE PRODUCTION.