Performing operations in a Pivot - sql-server

Question

I am trying to implement a PIVOT but I am having trouble performing basic operations in it.
Current table:
week_no username days pick_count duration
------------------------------------------------
Week 50 Beck W Wednesday 227 7978
Week 50 Beck W Friday 320 7481
Week 50 Beck W Friday 282 5718
Week 50 Cockram D Thursday 165 10478
Week 50 Cowell P Thursday 145 14403
Week 50 Cowell P Thursday 159 7450
Week 50 Cowell P Friday 217 13101
...
Expected result:
week_no username monday tuesday wednesday thursday friday saturday sunday
--------------------------------------------------------------------------
Week 50 Beck W NULL NULL 102 NULL 164 NULL NULL
Week 50 Cockram D NULL NULL NULL 56 NULL NULL NULL
Week 50 Cowell P NULL NULL NULL 50 59 NULL NULL
...
The expected result should be calculated as followed: pick_count * 3600 / duration. That is the calculation I am having problem computing. When PIVOTing like so
SELECT
*
FROM
(
SELECT
week_no,
username,
days,
pick_count,
duration
FROM
table
) AS src
PIVOT
(
SUM(pick_count) * 3600 / SUM(duration) FOR days IN (monday, tuesday, wednesday, thursday, friday, saturday, sunday)
) AS pvt
I get Incorrect syntax near '*'.

Answer 1

PIVOT is not very flexible.
You can just use the old style cross tab approach.
SELECT week_no,
username,
SUM(CASE WHEN days = 'monday' then pick_count end) * 3600
/ SUM(CASE WHEN days = 'monday' then duration end) as monday,
SUM(CASE WHEN days = 'tuesday' then pick_count end) * 3600
/ SUM(CASE WHEN days = 'tuesday' then duration end) as tuesday
/*TODO: Add other five days*/
FROM YourTable
GROUP BY week_no,
username

Answer 2

I eventually found what I was looking for. Indeed, all I needed to do was to compute the calculation in the SELECT instead of the PIVOT.
SELECT
*
FROM
(
SELECT
week_no,
username,
days,
SUM(pick_count) * 3600 / SUM(duration) AS pick_rate
FROM
table
GROUP BY
week_no,
username,
days
) AS src
PIVOT
(
MAX(pick_rate) FOR days IN (monday, tuesday, wednesday, thursday, friday, saturday, sunday)
) AS pvt