Ordering hand sanitiser

Mia is in charge of buying hand sanitiser for the festival. See how she is using calculation and conversion to make sure she orders enough…

Mia smiling.
Mia, the Engineering and Safety Advisor for the Salty Creek Community Festival, is busy calculating all the supplies that the festival needs while also trying to stick to a budget. The festival is required to provide hand sanitiser by the toilets, for health and safety compliance. Mia needs to know how much they’ll need to purchase and what it’s going to cost.


First, help Mia figure out how much hand sanitiser she needs to order.

three hand sanitiser dispensers

Calculating supply fill in the blanks activity transcript

Mia’s found a local supplier with a good price on an American brand of hand sanitiser. It comes in bottles that hold 1 US gallon of sanitiser and cost $50 each.

Can you figure out how many bottles the festival needs to purchase and the total order cost?

A large jug representing 1 US gallon with equals sign and three litre bottles and one partial bottle, representing 3.785 litres.

Converting units fill in the blanks activity transcript

Converting between units and calculating the cost of supplies is important not only when you’re planning a town festival, but also in everyday life—when shopping for household items, cooking a new recipe, or budgeting for a party.

Learn more on Learning Lab 

  • Check out units and conversions to learn more about calculating common units, their abbreviations, and how to convert between them. (20 minutes)


Icon for the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

Learning Lab Contextualised Content Copyright © 2022 by RMIT University is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

Share This Book