Calculate the covariance of the following ex-ante returns. Express your answer as a decimal with four digits after the decimal point (e.g., 0.1234 or -0.1234, not 12.34% or -12.34%).

s	ps	rA,s	rB,s
A	0.03	0.08	0.045
B	0.18	0.19	0.045
C	0.29	0.36	0.045
D	0.29	0.18	0.045
E	0.18	0.07	0.045
F	0.03	-0.55	0.045