Set up a short range trend chart of the operations appraisal cost or production cost ratio using the following information:
Month Operational appraisal costs (thousands) Production costs (thousands)
Jan $10 $100
Feb $13 $120
Mar $9 $115
Apr $11 $145
May $9 $125
June $8 $95
Jul $8 $105
What information does the chart give? Suggest additional information that could be valuable.