value adding with condition.

A column indicate time and B column is price. I will put D2 Time need to add all price in B2:B10.( less than d2 time)
Example;

Time .........Price
1:27 ....... -0.313
4:15 ....... -0.167
7:58 ....... 0.119
10:13 ...... -0.194
8:39........ 0.306
13:03 ....... 0.314
14:21 ...... 0.326
14:59 ...... 0.808
15:16 .......1.694

D2 time is 10.13, need to add -0.194+0.119+(-0.167)+(-0.313)=??????

sir, i need
if D2 time is 10.13, need to mines (-) count of less than zero and count of more than zero=??????

if time is 10.13,

less than zero count = 3 ((-0.194),(-0.167)+(-0.313))
more than zero count =1 (0.119)

my answer = 3-1 =2