summery calculation

Hi All
I want to make summery for

Date=245Duration=545 Date=245Duration=10Date=245Duration=278Date=246Duration=30Date=246Duration=178Date=246Duration=414Date=247Duration=17Date=247Duration=281Date=247Duration=9Date=248Duration=968Date=248Duration=550Date=248Duration=1011Date=248Duration=1659Date=249Duration=415Date=249Duration=230Date=249Duration=142Date=249Duration=600Date=250Duration=413Date=250Duration=86Date=250Duration=821

-----last figuer in millisecounds and round to secounds
(ex -545 = 55 ,10 = 1 , 278 = 28 and tot is 84)
The answer should be like following

Date=24584Date=24662Date=24739Date=248389Date=249513Date=250210

Thanks

I try to use

for i in `cat k`
do
aa=`echo $i |cut -d ',' -f1`
bb=`echo $i |cut -d ',' -f2`
echo $aa `echo $bb |cut -d '=' -f2|sed 's/\(.*\)\(.\)/\1.\2/'|awk '{print int($1+0.5)}'` >> duration_qc
done

please don't double post. edit your posts if you find errors!