Dallas was given a discount of 10 percent of the following items:

1/1/4 cartons of exercise books @ sh 42000 per cartons,ten cartons of pens sh 22000 each.How much did he pay all together after the discount of 10 percent?
*I need anyone to help me please*

And in case someone know where i can get such the questions,i am kindly need for practice
*Thanks for the response especially for the questions to practice

It would help if you proofread your questions before you posted them.

I assume "1/1/4" is 1 1/4.

(1-.10)(1.25*42000 + 10*22000) = ?