Develop an expression that is similar to the equation below $,$ to estimate the time required for the curbside$$ collection of source$-$separated wastes. You can make the following assumptions:$$

a$)$ Three separate containers will be used for $1)$ mixed paper; $2)$ commingled plastics and glass; and $3)$ commingled aluminum and tin cans.$$

b$)$ Several of the homeowners will also periodically put out cardboard for source$-$separate collection.

c$)$ Consider organic wastes $($food scraps$)$ to be included in the general trash collection.$$

Equation: tp$=$dbc$+$k$1$Cn$+$k$2($PRH$)$