By distributing {length} you get
{length} * {ppf} + {length} * {jacket_price} + {price} + {c1_price} + {c2_price} + {pe_price}
By distributing {length} you get
{length} * {ppf} + {length} * {jacket_price} + {price} + {c1_price} + {c2_price} + {pe_price}