39.375
39.375
47.250
74.240
200.240
Employee's preexisting disabilities represent 294.24 weeks of permanent partial disability. ${ }^{2}$ Employee's primary injury resulted in 105 weeks of permanent partial disability. The simple sum of all of employee's disabilities is 399.24 weeks.
[^0]
[^0]: ${ }^{1}$ Statutory references are to the Revised Statutes of Missouri 2006, unless otherwise indicated.
${ }^{2} 94$ weeks +200.24 weeks $=294.24$ weeks.
The preexisting disabilities in the instant case combine synergistically with the disability from the primary injury in different degrees. Thirty-two percent of the preexisting disabilities enhance employee's overall disability by 10 % over the simple sum. ${ }^{3}$ Sixty-eight percent of the disabilities enhance employee's overall disability by 15 % over the simple sum. ${ }^{4}$ To apply a load factor to the simple sum of all disabilities we use the weighted average of the load factors, which is calculated as follows:
$$
\begin{aligned}
\text { Weighted Average } & =(.32 \times .10)+(.68 \times .15) \\
& =.032+.102 \\
& =.134 \text { or } 13.4 \%
\end{aligned}
$$
Multiplying the simple sum of all disabilities by the weighted average of the load factors results in 53.5 weeks of enhanced disability that are attributable to the synergistic effect of the primary injury in combination with the preexisting disabilities. ${ }^{5}$
The parties agree employee's permanent partial disability compensation rate is $\ 376.55. The Second Injury Fund owes permanent partial disability benefits to employee in the amount of $\ 20,145.43, and we modify the administrative law judge's award accordingly. ${ }^{6}$
In all other respects, we affirm the administrative law judge's award, including his approval of attorney's fees in the amount of 25 % of the compensation awarded and his allowance of a lien on the compensation for such fees.
Any past due compensation shall bear interest as provided by law.
The award and decision of Administrative Law Judge Cornelius T. Lane issued June 27, 2012, is attached and incorporated by this reference except to the extent modified herein.
Given at Jefferson City, State of Missouri, this $17^{\text {th }}$ day of May 2013.
LABOR AND INDUSTRIAL RELATIONS COMMISSION
V A C A N T
Chairman
James Avery, Member
Curtis E. Chick, Jr., Member
Attest:
Secretary
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[^0]: ${ }^{3} 94 \div 294.24=.32.
{ }^{4} 200.24 \div 294.24=.68.
{ }^{5} 399.24 weeks X .134=53.5 weeks.
{ }^{6} 53.5 weeks X \$ 376.55=\ 20,145.43.