A fictional paper diagram needs four sections of 3/4 m and two of 1/2 m. Stock comes in whole 1 m units at $1.25 each, with no fee. Joins are allowed and every length is usable. Budget is $6. Ask a useful question about the order, calculate and explain your decision. Then ask one next question if these were real materials.
A way to check: total length 3 + 1 = 4 m; buy 4 units for $5, leaving $1 of the budget and no unused length under this model. A useful next question is whether joins or cutting loss would matter in the actual use. No real purchase is invited.