To start out, get a fresh, crisp dollar bill, because it's the least expensive to make and folds the easiest while giving it a professional look at the end!
Step 1: Precrease
Step 2: Fold the Bill in Half and Crease the Corners
Step 3: Reverse Fold
Step 4: Fold the Long Flaps Up As Far As Possible
Step 5: Flip Out
Step 6: Finished!
-If you want to connect the two together, fold up the corners of the shirt so that it becomes a point able to fit in the dollar pants.
Thanks for reading, and feel free to comment as I'm hoping to answer any questions you all may have.