"If Tom buys a red skateboard then Amanda buys green in-line skates". Which statement below is logically equivalent?

If Amanda does not buy green in-line skates then Tom does not buy a red skateboard

If Tom does not buy a red skateboard then Amanda does not buy green in-line skates

If Amanda buys green in-line skates then Tom buys a red skateboard

If Tom buys a red skateboard then Amanda does not buy green in-line skates

The original statement and its contrapositive are logically equivalent. Remember that the contrapositive is the “converse of the inverse"