The answer is 10.
let x be the money she spent so that she can earn the free t-shirt.
since, she already spent $112.49
also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.
we have an inequality i.,e
subtract 112.49 from both sides we get;
therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt