At store A a trophy costs $12.50. Engraving costs $0.40 per letter. At store B, the same trophy costs $14.75. Engraving
costs $0.25. How many letters must be engraved for the cost at
store B to be less expensive?

entering that problem on the tube might get you an answer

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.

then,

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