we know that
scale factor=2.5
volume larger warehouse=scale factor³*volume smaller warehouse
volume larger warehouse=2.5³*volume smaller warehouse
volume larger warehouse=[15.625]*volume smaller warehouse
that means
the volume of the larger warehouse is 15.625 times the volume smaller warehouse
the energy and cost is proportional to the volume
so
the new cost is 15.625*$125-----> $1953.12------> $1953
the answer is
$1953