20% of Lidl's sales will be non-food and grocery items (but not for the purpose of the Transport Assessment)

The applicant’s Retail Impact Assessment shows that Lidl’s total comparison turnover is expected to be £2.16m, out of a total of £11.02m. In other words, Lidl expects almost 20% of its sales to come from non-food and grocery items.
Yet, the Transport Assessment states “The store would potentially include some electrical and homeware items, but these would be somewhat limited and ad-hoc in nature.”.
This incongruent data is used to help justify the claim that 72% of traffic to the store will be passing by anyway and therefore will not contribute to additional congestion!