Jim and Barbara bought four presents for various weddings, but they couldn't
agree on four identical gifts. They bought four separate gifts. The
first cost $5.00 more than the second. The second was half the cost of the
first, plus one-third the cost of the first. The third cost two-thirds of
the first, and the last one cost double the third. They spent a total of
$115. What did each of the gifts cost?