Steve runs a kennel and purchases dog food from a U.S. supplier.
The supplier sells $25\mathrm{lb}$ bags for $\mathrm{\$}28.95$ U.S.
a) Each dog eats about $3.5\mathrm{kg}/$ week and Steve boards an average of 16 dogs per day. How many bags of dog food will he need for three months?
b) The exchange rate is $\mathrm{\$}1$ U.S. for $\mathrm{\$}1.06\mathrm{Cdn}$ on the day that Steve orders the food. How much will the three month supply of dog food cost in Canadian dollars?

Step 1 ：$\text{a) Calculate the total amount of dog food needed for 3 months:}$

Step 2 ：$\text{Total dog food per week}=3.5\times 16\times 7\text{ kg}=392\text{ kg}$

Step 3 ：$\text{Total dog food for 3 months}=392\times 3\text{ kg}=1176\text{ kg}$

Step 4 ：$\text{Convert kg to lb: }1176\text{ kg}\times 2.20462\text{ lb/kg}=2592.24\text{ lb}$

Step 5 ：$\text{Calculate the number of bags needed: }\frac{2592.24}{25}=103.6896$

Step 6 ：$\text{Steve needs }\boxed{{\displaystyle 104}}\text{ bags of dog food for 3 months.}$

Step 7 ：$\text{b) Calculate the cost in Canadian dollars:}$

Step 8 ：$\text{Total cost in U.S. dollars}=104\times 28.95=3010.8\text{ USD}$

Step 9 ：$\text{Total cost in Canadian dollars}=3010.8\times 1.06=3191.448\text{ CAD}$

Step 10 ：$\text{The three month supply of dog food will cost }\boxed{{\displaystyle \mathrm{\$}3191.45\text{ CAD}}}$