John has taken four (4) tests that have an average of 85. In order to bring his course grade up to a ‘B’, he will need to have a final average of 89. What will he need to average on his final two tests to achieve this grade?	Select:
A) 87
B) 90
C) 92
D) 97
E) 98
Traditional Method:   Total scored till now 85*4= 
<gadget id="calculator">85*4</gadget>
<output>340</output>
340   Total score to avg 89 in 6 tests= 89*6= 
<gadget id="calculator">89*6</gadget>
<output>534</output>
534   Total to be scored on 2 tests= 534-340= 
<gadget id="calculator">534-340</gadget>
<output>194</output>
194   Avg on 2 tests= 194/2= 
<gadget id="calculator">194/2</gadget>
<output>97</output>
97   Answer: 97
<result>D</result>
John has taken four (4) tests that have an average of 85. In order to bring his course grade up to a ‘B’, he will need to have a final average of 89. What will he need to average on his final two tests to achieve this grade?