f
e
e
d
(
m
a
s
s
o
r
r
a
t
e
u
n
i
t
s
)
5
0
.
x
f
(
w
e
i
g
h
t
/
w
e
i
g
h
t
f
r
a
c
t
i
o
n
)
0
.
1
x
c
(
w
e
i
g
h
t
/
w
e
i
g
h
t
f
r
a
c
t
i
o
n
)
0
.
2
c
o
n
c
e
n
t
r
a
t
e
a
x
i
s
m
a
x
.
4
0
.