Need an answer of the following quiz

You saw a t-shirt of R97 since you don't have cash you borrow R50 from your dad and your mom. Now you have R100. You purchase a t-shirt for R97 and left with R3 change. You return R1 to your dad and R1 to your mom and keep the R1 for yourself. Now you owe your mom R49 and your dad R49. Added together (R49+R49=R98 plus your R1=R99.Where is the missingR1? Please give me the answer