At first they paid $30-
7 T$ `& i0 N- C4 ?9 rand they get return $3-tvb now,tvbnow,bttvb# `& ]# A4 q! ]( W* x( K
that mean they just paid $27-8 i s6 Z, C0 @/ Z8 Y0 P% j7 O
the owner take $25- and the servant take $2/ Z- a+ C4 g# V- G
so the sum is totally equal |