Exhibit 99 - Explanation of Response

Footnote 2
Represents the following shares beneficially owned by
Bradford Luke Ledbetter ("Luke Ledbetter"): (i)
648,120 shares held by the Bradford Luke Ledbetter
1999 Grantor Trust No. 2 for which Luke Ledbetter
serves as co-trustee with Lonnie K. Ledbetter III,
with whom he shares voting and dispositive power over
such shares; (ii) 3,499,476 shares held by the
following trusts for which he serves as co-trustee
with Terry Lee Ledbetter, Jr. ("Terry Ledbetter,
Jr."), with whom he shares voting power over such
shares and with whom, together with an independent
trustee, he shares dispositive power over such shares:
(A) 986,794 shares held by the Bradford Luke Ledbetter
2006 Grantor Trust No 2; (B) 910,432 shares held by
the Bradford Luke Ledbetter 2010 Grantor Trust No. 2;
(C) 996,540 shares held by the Terry Lee Ledbetter,
Jr. 2006 Grantor Trust No. 2; and (D) 605,710 shares
held by the Terry Lee Ledbetter, Jr. 2010 Grantor
Trust No. 2; (iii) 601,344 shares held by the Terry
Lee Ledbetter, Jr. 1999 Grantor Trust No. 2 for which
he serves as co-trustee with Terry Ledbetter, Jr.,
with whom he shares voting and dispositive power over
such shares; and (iv) 859,332 shares held by The
Ledbetter Family and Charitable Irrevocable 2012 Trust
for which Luke Ledbetter serves as sole trustee and
has sole voting and dispositive power over such
shares.