Help Required

[madacus]

Please help with the below maths problem (couldn't help my son with this)

Cloister House girls have a bake sale. a drink of squash costs 3p per drink and biscuits costs 5p each. Each girl buys the same amount of drinks and each girl buys the same amount of biscuits. The total from all sales is £1.33. How many drinks and how many biscuits did each girl buy?