Calculating total space in GB for all files with typical pattern

Hi Experts,

In a particular dir, I have many files *AJAY*.
How can I get total size of all such files.
I tried du -hs *AJAY* but it gave me individual size of all files.
All I require is summation of all.

Thanks,
Ajay

du -hs *AJAY*| awk '{sum+=$1} END{print sum}'
du -sh *AJAY*|  nawk '$1~/K$/ {$1=$1+0;sum+=$1/(1024*1024)} $1~/M$/ {$1=$1+0;sum+=$1/1024} $1~/G$/ {$1=$1+0;sum+=$1} END{print sum}'

Thanks zaxxon but this is not working....printing 0

du -ks *AJAY*| awk '{sum+=$1} END{printf("%dM\n",sum/1024)}'