I add some more debug code, which produced the following,
$G$36 0 cini= 7 cfin= 19 stk= 0 rownum= 33 prev= 999
$H$36 0 cini= 8 cfin= 19 stk= 0 rownum= 33 prev= 999
$I$36 6599.124 cini= 9 cfin= 19 stk= 6599.124 rownum= 33 prev= 999
$J$36 13198.248 cini= 10 cfin= 19 stk= 13198.248 rownum= 33 prev= 999
$K$36 19797.372 cini= 11 cfin= 19 stk= 19797.372 rownum= 33 prev= 999
$L$36 26243.028 cini= 12 cfin= 19 stk= 26243.028 rownum= 33 prev= 999
$M$36 26089.56 cini= 13 cfin= 19 stk= 26089.56 rownum= 33 prev= 999
$N$36 25936.092 cini= 14 cfin= 19 stk= 25936.092 rownum= 33 prev= 999
$O$36 25782.624 cini= 15 cfin= 19 stk= 25782.624 rownum= 33 prev= 999
$P$36 19336.968 cini= 16 cfin= 19 stk= 19336.968 rownum= 33 prev= 999
$Q$36 12891.312 cini= 17 cfin= 19 stk= 12891.312 rownum= 33 prev= 999
$R$36 6445.656 cini= 18 cfin= 19 stk= 6445.656 rownum= 33 prev= 999
$S$36 0 cini= 19 cfin= 19 stk= 0 rownum= 33 prev= 999
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