Deducting a from a minus value

[Anuru]

Dear Experts,

Kindly let me know how should I get the difference between C5,D5 and E5 etc and C6, D6 and E6 ignoring the minus sign in C5,D5 and E5. However, the resulted difference should show -/+ depending on the bigger value.

Thanks in advance.
Anuruddha