Pentomino Box Packing : 7×5×3 −45

1 solution.

1. IIIIINN | XPPNNNF | PPPLLLL
   X.....F | X.....F | X.....L
   U.....T | X.....F | U.....F
   U.....T | U.....T | U.....T
   VVVZWWT | VZZZYWW | VZYYYYW