importing time from pdf as table and calculating

Hi,

I view my rogers phone bill online and it allows me to save it as a pdf that I can access later... I then import the date using the table select function but when I try to sum the table, I get zeros.

for example..

10:00
22:10
16:00

=sum(a1:a3) the formula
00:00 what I see
48:10 what I should get.

Can someone help me solve this ?

the .xls is attached in zip format...

Thanks !!